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Shudders into 1st from OD

5.0L (1979-1995) Mustang Technical discussions on 5.0 Liter Mustangs within. This does not include the 5.0 from the 2011 Mustang GT. That information is in the 2005-1011 section.

Shudders into 1st from OD

Old 04-13-2007, 04:47 PM
Thread Starter
Join Date: Apr 2007
Posts: 5
Default Shudders into 1st from OD

Hey guys im new here. Just bought my first mustang. Its an 87 GT hatch. Its got an H pipe and flowmasters, rebuilt AOD with a shift kit and 3.90's in the rear.
Its got a weird thing though, not all the time, but sometimes when its just in OD and im stopping when it shifts into first it shudders it feels like its from the rear end, but if its just in D is doesn’t do it. The car shifts fine all the other times and it doesn’t always do it. For example it did it on my way home last night, but didn’t do it on my in to work this morning, but then did do it on my lunch break. Any ideas on what it is? Ive never had this problem before, so im kinda lost.
Also which speedo gear should i get for the 3.90's? the one for 3.73's or 4.10's? id rather it read a little faster than im actually going just to be safe
kennydenney is offline  
Old 04-13-2007, 04:49 PM
6th Gear Member
Join Date: Jun 2006
Location: Maine
Posts: 5,693
Default RE: Shudders into 1st from OD

Does it shudder as well when slowly acelerating from a stop or is it strictly related to OD and downshifting?

How clean is the fluid? Does it look pretty red or is it brown? (or worse, black.... or better, purple!)
samseed101 is offline  
Old 04-13-2007, 05:54 PM
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Join Date: Apr 2007
Posts: 5
Default RE: Shudders into 1st from OD

its smooth upshifting, only does it into first in OD. I actually havent even looked at the fluid yet i was going to when i got home tonight.
kennydenney is offline  
Old 04-13-2007, 06:40 PM
Arrid Extra Dry
2nd Gear Member
Join Date: May 2006
Posts: 236
Default RE: Shudders into 1st from OD

i have a stock 89 lx with an aod,
when you start off in first and give it over half throttle , then let off of it, it sounds like the rear end is comming out. but its the trasnsmission.
it has about 120k on it, and i just thought the filter might be stopped up and starving for fluid, so i changed the fluid and filter, still does it.
but no, i dont know what causes it. im not good on aod transmissions.maybe a lose band in the transmission?

so i guess that didnt help ya any, sorry.

NEXT>>>>>>>>>>>&g t;>>>>
Arrid Extra Dry is offline  
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