07-13-2011, 02:13 PM
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#1
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Aleromod part owner
Join Date: Nov 2003
Location: Far Northeast Philadelphia, PA
Posts: 18,199
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Tranny swap
Found out today that my tranny pump isn't keeping a good pressure at all times. My mech said the pump is on the way out, so I'm looking right now at a new or used transmission. Used installed would be $1000 with a short warranty (30 days to 6 months) and new would be $2900 with a 3 year 36,000 mile warranty. Thinking the new, but it depends on WHEN it goes and what the wallet sasys at that time
I know I have the 4T45 transmission, and I also know that the GAGT Tranny has a 3.29 FDR and the Cobalt, Ion, G6 base, etc have the 3.63 FDR
Two questions:
1 Which would be the better FDR for my car? I googled FDR's and found that the calc's aren't that far off using 3.05 FDR, with a 25 inch tire at 70 MPH I came up with 2009 RPM's which is pretty damn close if not dead on. I like the 3.29 but thinking the quickeness of a 3.63 would be just simply
2 If I did the 3.63 FDR, all those trannies are mated to 4 bangers. Are the clutch packs, tranny pump, gears, etc able to handle a V6 motor, or did GM used weaker items to save money?
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33% ALEROMOD OWNER!!
2000 Olds Alero 3400 SFI 14.53 @ 94.93
1985 Olds Delta 88 307 SBO 17.96 @ 76.99
2007 Volvo V50 T5 6M 15.782 @ 89.12
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07-13-2011, 02:19 PM
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#2
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Aleromod part owner
Join Date: Nov 2003
Location: Far Northeast Philadelphia, PA
Posts: 18,199
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Keep in mind I'm going to be doing an engine build with a WOT-TECH Street/Strip cam
Specs of cam:
Quote:
WOT-TECH web site- 259/265 adv duration
- 210/216 .050" duration
- .506"/.506" lift @ 1.6:1 Rocker Ratio
- 113 Intake Center Line
- 114 Lobe Seperation Angle
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__________________
33% ALEROMOD OWNER!!
2000 Olds Alero 3400 SFI 14.53 @ 94.93
1985 Olds Delta 88 307 SBO 17.96 @ 76.99
2007 Volvo V50 T5 6M 15.782 @ 89.12
www.facebook.com/kb0177
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07-13-2011, 02:19 PM
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#3
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i speed up for corners
Join Date: Apr 2009
Location: Dover,NH
Posts: 3,489
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i know this is of topic but have you thought of swaping in the 4T65e-HD from the grand prix.
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Alero is gone but not forgotten
1999 black gls coupe R.I.P 130k
1999 auburn mist metallic gls sedan R.I.P
2005 Subaru legacy 2.5i 190k. New rims and tires for summer.
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07-13-2011, 05:32 PM
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#4
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Just as a comparison Ken, my trans has a 3.42FDR and the motor is turning ~2000rpm @ 60mph. 70mph is ~2300rpm.
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07-13-2011, 08:04 PM
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#5
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Aleromod part owner
Join Date: Nov 2003
Location: Far Northeast Philadelphia, PA
Posts: 18,199
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^^ Hmmmm, I'm guessing that a 3.63 might be a little too high for my cruising tastes. 2300 @ 70 would be good.
What car had a 3.42 FDR? I'm not going to be doing a rebuild, just a swap
Quote:
i know this is of topic but have you thought of swaping in the 4T65e-HD from the grand prix
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After the problems Bdyman had, no way
__________________
33% ALEROMOD OWNER!!
2000 Olds Alero 3400 SFI 14.53 @ 94.93
1985 Olds Delta 88 307 SBO 17.96 @ 76.99
2007 Volvo V50 T5 6M 15.782 @ 89.12
www.facebook.com/kb0177
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07-13-2011, 09:03 PM
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#6
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Premier V.I.P. Member
Join Date: Sep 2010
Location: Howard, KS
Posts: 1,848
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Quote:
Originally Posted by Redog
^^ Hmmmm, I'm guessing that a 3.63 might be a little too high for my cruising tastes. 2300 @ 70 would be good.
What car had a 3.42 FDR? I'm not going to be doing a rebuild, just a swap
After the problems Bdyman had, no way
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what problems did he have?
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2004 Audi TT Quattro 1.8t
1969 Chevrolet Biscayne 2d
1963 VW Beetle
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07-13-2011, 09:22 PM
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#7
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Bdyman also had an LS4....a bit more power in a much heavier car.
I had my transmission rebuilt with different drive/driven gears. The LD9/4T40-E Alero came with this gearset.
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07-13-2011, 09:30 PM
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#8
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Aleromod part owner
Join Date: Nov 2003
Location: Far Northeast Philadelphia, PA
Posts: 18,199
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How good are those gears/clutches/etc in stock form in the 4T40.
It's the same case, right
__________________
33% ALEROMOD OWNER!!
2000 Olds Alero 3400 SFI 14.53 @ 94.93
1985 Olds Delta 88 307 SBO 17.96 @ 76.99
2007 Volvo V50 T5 6M 15.782 @ 89.12
www.facebook.com/kb0177
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07-13-2011, 09:32 PM
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#9
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Aleromod part owner
Join Date: Nov 2003
Location: Far Northeast Philadelphia, PA
Posts: 18,199
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Quote:
Originally Posted by 03Sleepr
what problems did he have?
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I know he blew 2 transmissions, maybe 3 or 4, with normal driving and in was a common problem for that car
Not really looking at the fab work, IDK, it all depends on when this trany goes, I just like to have options
__________________
33% ALEROMOD OWNER!!
2000 Olds Alero 3400 SFI 14.53 @ 94.93
1985 Olds Delta 88 307 SBO 17.96 @ 76.99
2007 Volvo V50 T5 6M 15.782 @ 89.12
www.facebook.com/kb0177
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07-13-2011, 09:40 PM
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#10
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Quote:
Originally Posted by Redog
How good are those gears/clutches/etc in stock form in the 4T40.
It's the same case, right
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I couldn't say......when I had the gears replaced, I did a new chain, Blue Plate clutches, new steels, and billet accumulator pistons.
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07-13-2011, 09:43 PM
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#11
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Aleromod part owner
Join Date: Nov 2003
Location: Far Northeast Philadelphia, PA
Posts: 18,199
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What did that run?
I'm pretty much looking for something that will also match my new cam which I have listed above. Matt the heads I bought off you will work nicely with that cam, but I also want to get the proper gearing and convertor for it. The convertor can be replaced at the engine build
__________________
33% ALEROMOD OWNER!!
2000 Olds Alero 3400 SFI 14.53 @ 94.93
1985 Olds Delta 88 307 SBO 17.96 @ 76.99
2007 Volvo V50 T5 6M 15.782 @ 89.12
www.facebook.com/kb0177
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07-13-2011, 10:14 PM
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#12
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GX Member
Join Date: Aug 2006
Location: Indiana
Posts: 81
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If you are looking to do it on the cheap, find a low mileage 4t45e out of a 03-05 Grand Am GT (3.29 ratio). I picked up a used 4t45e out of a 04 gagt in MI that had 25K miles for $150 a few months ago. It was missing the torque converter, but I had one in the garage so I was good to go.
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07-13-2011, 10:19 PM
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#13
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Aleromod part owner
Join Date: Nov 2003
Location: Far Northeast Philadelphia, PA
Posts: 18,199
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I actually took a peek at car-part.com and found one not too far away out of a 05 GAGT with only 3,385 miles on it Somehow I doubt that mileage
Seen others on there fairly inexpensive
__________________
33% ALEROMOD OWNER!!
2000 Olds Alero 3400 SFI 14.53 @ 94.93
1985 Olds Delta 88 307 SBO 17.96 @ 76.99
2007 Volvo V50 T5 6M 15.782 @ 89.12
www.facebook.com/kb0177
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07-13-2011, 10:37 PM
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#14
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Powered by LX9
Join Date: Mar 2010
Location: fox vally wi
Posts: 1,429
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what are the advantages of grabing a gagt tranny instead of a alero one?
the alero being a 6 cyl
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2001 ALERO GL SED 4 DR--Build Date: 08-16-2000. There are 17 2001 ALERO GL 4 DR vehicles (0.019%) matching my exact options list.
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07-14-2011, 09:17 AM
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#15
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GLS member
Join Date: Mar 2008
Location: Baltimore, MD USA
Posts: 5,529
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I don't know about Alero's, but on my 1995 Ford Escort the transmission's oil pump is externally mounted and actually pretty easy to get to once you have removed a wheel and a splash shield. It would not be much of a problem to replace just the transmission oil pump on that car. It's that rusty thing pictured here:
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07-17-2011, 02:15 AM
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#16
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Moderator
Join Date: Nov 2004
Location: Long Grove, IL
Posts: 5,002
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Ever think about going with a higher stall converter? Maybe one from like a 2200 J-Body?
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Cliff Scott
2004 Alero GX w/sport pkg - Sold, living somewhere in WI now.
2011 Saab 9-5 Turbo4 M6
2004 Corvette Convertible M6
1994 Chevy Beretta - Quad4/M5
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07-17-2011, 07:54 PM
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#17
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Aleromod part owner
Join Date: Nov 2003
Location: Far Northeast Philadelphia, PA
Posts: 18,199
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Well I'm going to need a high stall convertor anyway.
What's the stock convertor stall anyway
__________________
33% ALEROMOD OWNER!!
2000 Olds Alero 3400 SFI 14.53 @ 94.93
1985 Olds Delta 88 307 SBO 17.96 @ 76.99
2007 Volvo V50 T5 6M 15.782 @ 89.12
www.facebook.com/kb0177
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07-17-2011, 11:04 PM
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#18
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Moderator
Join Date: Nov 2004
Location: Long Grove, IL
Posts: 5,002
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Not sure what it is, but the "73CW" is the highest stall factory converter you can get with the woven carbon lining....
__________________
Cliff Scott
2004 Alero GX w/sport pkg - Sold, living somewhere in WI now.
2011 Saab 9-5 Turbo4 M6
2004 Corvette Convertible M6
1994 Chevy Beretta - Quad4/M5
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07-18-2011, 03:11 AM
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#19
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3500 DONE!
Join Date: Apr 2006
Location: Albany, NY
Posts: 5,915
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I like this thread....cause my tranny is starting to poop the bed and i want to rebuild it but make it able to handle the abuse i want to put on it in the future :P I will be keeping a CLOSE eye on this thread
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2002 3400 & 3500 GL "Ruby"-->R.I.P. 163k. My first car. Put 130k on her.
2000 3500 GLS "Robin"-->Intake,Headers,Exhaust,H&R springs,KYB AGX,Sway bars,Strut bars and more
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07-19-2011, 08:50 AM
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#20
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GLS member
Join Date: Mar 2008
Location: Baltimore, MD USA
Posts: 5,529
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Isn't there a way you can make the existing transmission oil pump increase the oil pressure by putting in a stronger spring? I've seen threads about it (not here) and for my Escort there is a TSB on it with a revised valve and spring.
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