Weird Tranny/Driveline Shudder - TCCoA Forums
 
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post #1 of 5 (permalink) Old 07-16-2011, 06:23 AM Thread Starter
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Weird Tranny/Driveline Shudder

Hey Guys,

I wanted to get a few heads together so i can figure out whats up with my 95 SC.

It has a J-Modded 4r70w, that has 46K original miles, and approx. 12K since J-Mod. The trans has a 28k gvr cooler on it. The fluid is nice and red, and doesn't smell burnt

Here's the symptoms..

The car will run completely fine in reverse. Shift the tranny to D and it shudders almost like ABS is kicking on up until D-1 shifts to D-2. You can power through it and once it shifts, it's smooth as glass.

The car WILL not do the shudder if you manually shift it to 1st Gear. Runs great. Car will also not do it outside of 1st gear. I was messing with it trying to figure it out and went from 1-2-D and had no issues.

I said it sounded like ABS, because it's just...well a weird chugging/grinding sound. Again, to sum it up, the car ONLY does it while in D-1. Manually put the car in 1st and no issue.


Thanks guys.
-Corey

'94 SC - Black on Blue. Currently KIA due to drunk driver.
'95 SC - Black on Grey. 45K Miles. Converting to the darkside.
'02 Lincoln LS V8- Black on Grey. Daily Driver.
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post #2 of 5 (permalink) Old 07-16-2011, 07:41 AM
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When you say shudder do you mean like a vibration. I have a vibration problem when shifting it in reverse. Sometimes it happens and sometimes it doesn't. I am wondering if it is tranny, engine mounts or driveshaft.
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post #3 of 5 (permalink) Old 07-16-2011, 08:14 AM Thread Starter
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I wouldn't exactly call it a vibration. It's like ABS kicks on and makes the whole car move.

-Corey

'94 SC - Black on Blue. Currently KIA due to drunk driver.
'95 SC - Black on Grey. 45K Miles. Converting to the darkside.
'02 Lincoln LS V8- Black on Grey. Daily Driver.
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post #4 of 5 (permalink) Old 07-16-2011, 10:11 AM
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Lightbulb

You might get Shop to pull Tranny Codes if you have blinky OD light yet, but sometimes it takes a while for that to show.

- As always I'd replace MLPS for starters.

- If you still have the prob look over the Article CLOSELY - It's DEFINITELY in a tad different mechanical mode when Shifter is Manually in 1 as opposed to when it's in 1st gear when Shifter is in D (as per direction fm MLPS, Main Valve, etc...) - So possibly Solenoid Pack or worn EPC seals... DD will know when he checks in.

- If you had pan down for above before I panicked & pulled Tranny you might try double checking you JMOD install AND maybe more importantly your Main VB sub assemblies (see the Sonnax site).

- IF you find no joy after working thru ALL the above then it's something deep... & yes you will probably just chunk the 95 Tranny & TC even with those low miles.

- BTW I have 2002 TBIRD kinda like your LS - Don't EVEN THINK about dropping Pan for Fluid change in that thing ~!

http://www.thunderbirdnest.com/forum...t=28202&page=2

GET OFF MY LAWN~! ... & Let's not forget guys... There's still a dead Imaginary Ex-Girlfriend out there...

Last edited by BUCK; 07-16-2011 at 10:30 AM.
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post #5 of 5 (permalink) Old 07-16-2011, 02:04 PM
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Quote:
Originally Posted by BUCK View Post
- BTW I have 2002 TBIRD kinda like your LS - Don't EVEN THINK about dropping Pan for Fluid change in that thing ~!

Well you still need to drop the pan to replace the Filter in the 5r55w. Just need a suction Gun to fill er back up ..
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