Changed my trans now I have new issues

Started by White93z34, April 29, 2010, 07:58:33 PM

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White93z34

April 29, 2010, 07:58:33 PM
so I finally got my car back together. I got the trans from a wrecked car and it is a turbo specific one too. first and foremost I found these when I was dropping the pan to change the filter




no idea what those are...

however its issues are:
occasionally it will absolutely slam the 1-2 shift, way harder then I feel it should
recently it will get fits where it won't want to engage first gear leaving a traffic light or a stop sign. sometimes it will do it no problem other times it will rev like its in neutral till you give it way too much gas then it will bark the tires and then start moving fine.

today I started it and it would not go into reverse or drive then a minute or 2 later it went in just fine.

I should mention that before I installed this trans it sat unused for several years, dry in a garage under plastic.

more often then not it performs overall well it will upshift, downshift good. TQ lockup works fine

basically is there anything I should look for, or am I screwed and in need of a trans rebuild?
-Chris D.


1992 Chevrolet Lumina Z34 3.4L TDC Hydramatic 4T60E
1990 Pontiac Turbo Grand Prix 3.1L v6 Hydramatic 4T60
1997  Pontiac Bonneville SSE 3.8L v6, Hydramatic 4T60E
1987 Chevrolet Camaro 5.0L v8, Hydramatic 700R4

mfewtrail

#1
April 29, 2010, 10:33:27 PM
With that piece in the pan and those issues, I'm guessing there is an internal issue. I'm not sure, but I think those pieces might be from a thrust washer. With no reverse or drive until you rev it up, it sounds like something isn't holding properly and then grabs. Maybe something is wrong with the input clutch/sprag? I believe that's used in both 1st and reverse.
'93 SE, '90 Black/tan TGP, & '90 Red/tan TGP

89BlackTGP

#2
April 30, 2010, 01:32:42 PM
I totally agree with Matt.. I had the same pieces in the bottom of my 4t60-e and had a professional tranny guy look at it and he said it was a thrust washer.. I gave you the same info over on w-body.. I never ran the trans after that he told me it was in need of a full rebuild after he saw that.. so i did and i basically got a new tranny back..
1996 Pontiac Grand Prix SE 3100/4T60-E (Black)

1995 Pontiac Grand Prix GTP 3.4 DOHC/4T60-E (White)

1990 Pontiac Turbo Grand Prix 3.1/4T60 (Black)

jimmy

#3
May 02, 2010, 09:11:28 PM
          I still have the VIDEO of the of the whole complete rebuild if your interested in doing it yourself.  :icon_cool:
          Its a 90 minute VHS tape by Technical Video for the automatic front wheel drive GM 440 T-4 1990.
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