Tranny Issues - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 02-28-2007, 01:17 PM   #11
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TJ, ignore the modulator vacuum line. That won't make it slip, that will make HARSH shifts.

Changing the fluid has never doomed a trans that we've ever seen here. But what do you have to lose? You have no first gear anyway.

Either get a flush, or drop the pan and do the filter. That'll only get about a third of the fluid, but it might be enough.
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Old 02-28-2007, 01:37 PM   #12
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actually i have first now, but for how long is the question. It is werid how this came along so quick. No signs or syptoms. I am going to probably drop the pan and do a filter change then drive for about a month (if it last) and drop the pan and do it again. That should be about 1/2 the fluid correct? I guess it cant hurt. Does anyone have any ideas about the gt tranny? Is there anything besides the gearing the pcm i have to do if it comes to this?
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Old 02-28-2007, 02:50 PM   #13
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My trans was slipping on take off from a cold stop every now and then and I changed the fluid/fliter and it went away. Not exactly the same problem but I think you really don't have anything to loose with changing the fluid.
And as for a GP tranny. Nope. They are 65s and require a different pcm to control line pressure. You could get a 3.33 diff though. Thats a whole other topic though.
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Old 02-28-2007, 03:00 PM   #14
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but dont the 1997 gt'* run the 4t60e? i believe so
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Old 02-28-2007, 03:04 PM   #15
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here is a tranny ed morad is selling for a 1997 grand prix gt that is a 4t60e. http://cgi.ebay.com/ebaymotors/GM-4t...6437QQtcZphoto
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Old 02-28-2007, 04:12 PM   #16
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Yes the 97s did but a, theres no way the wiring is the same and b, 60s never can with 3.29s, they came with 3.33s.
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Old 02-28-2007, 04:22 PM   #17
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Quote:
Originally Posted by 95naSTA
Yes the 97s did but a, theres no way the wiring is the same and b, 60s never can with 3.29s, they came with 3.33s.
Actually the 4T60-E did have the 3.29 in later years depending on what it was in... Even the 96 3400 Minivan had the 3.29 gears

And at the same time I believe you could still have a 3.33, a lot of 3100'* came with the GX3 in both the 4T60 and 4T60-E..

60-E could have

2.84
2.86
2.93
2.97
3.06
3.29
3.33

2.93 and 3.29 and 2.97 and 3.33 simply used different drive and driven sprockets

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Old 02-28-2007, 05:54 PM   #18
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Ben has a '95 4T60-E in his 97.... No re-wiring required. The thing to watch out for with later model transmissions is the PWM TCC solenoid and if yours is the same setup... I think... Hope this is more useful information than useless.
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Old 03-01-2007, 01:08 PM   #19
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i drove it to clinicals yesterday and it was fine the hole time. I am going to do a filter and fluid change and just go from there.
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Old 03-01-2007, 02:37 PM   #20
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I never tried it but before you change the fluid you could try the Lucas additive. Some on the BC have used it sucessfully. Run it a week then change the fluid and filter.
I allways view trans additives as a last resort fix. If its starts slipping again what do you have to loose.
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