THM 350 Delayed Shift Into Drive
December 22nd, 2014, 05:36 AM
#1
Registered User
Thread Starter
Join Date: Dec 2007
Location: Fort Pierce, FL
Posts: 1,124
THM 350 Delayed Shift Into Drive
My 72 350/350 delays when shifting into drive after sitting for a day or two. It starts right up, idles perfect, It will immediately shift into reverse and I can back up, but there is a delay when I shift to drive.
Is there something relatively simple, or am I looking at a rebuild in my future. Recent fluid and filter change and the fluid is red and does not smell burnt. One the initial shift into drive occurs, it then engages without issue. It is only on the first shift into drive, and never into reverse.
Is there something relatively simple, or am I looking at a rebuild in my future. Recent fluid and filter change and the fluid is red and does not smell burnt. One the initial shift into drive occurs, it then engages without issue. It is only on the first shift into drive, and never into reverse.
December 22nd, 2014, 06:35 AM
#2
morgan
Join Date: Mar 2011
Location: CT
Posts: 1,925
a lot of things take place in the valve body to make it shift properly, sounds like pressure is good u joints tight and vacuum line good, maybe a check ball is sticking when fluid is cold or an o ring is a little shrunken its a tough thing for me any way to figure. i dont think its vacuum related. if this just started after a fluid change that could be the reason because that gray film circulating around the tranny keeps everything in order, i never like to change trans fluid unless absolutely necessary. if it were me i would just keep an eye on it for awhile to put some miles on the fact that it is fine when warmed up is a relief, it may just settle in after a while but if it starts slipping then you will know where you stand,
and of course triple check the fluid level
and of course triple check the fluid level
Last edited by pogo69; December 22nd, 2014 at 06:37 AM.
December 22nd, 2014, 08:46 AM
#3
Registered User
Thread Starter
Join Date: Dec 2007
Location: Fort Pierce, FL
Posts: 1,124
It has been doing it for a while, and didn't start after a fluid change. I just thought if it was something simple that I hadn't thought about, I might try to fix it. As I said, once the first shift into drive the first time, it performs as it should with no issues.
December 22nd, 2014, 09:05 AM
#4
morgan
Join Date: Mar 2011
Location: CT
Posts: 1,925
there are limited things you can do externally to correct trans issues... fluid level, vacuum connection,elec connections...other than that problems are internal which means rebuild sometimes swapping out just the valve body will fix some things and that can be done with the trans still in the car. if you have a lot of miles on your car it just may need a rebuild. i dont think any trans medic products will work and will just accelerate the problem. maybe someone has recently had this exact issue and has other clues
Thread
Thread Starter
Forum
Replies
Last Post
esisson
Parts For Sale
1
May 22nd, 2008 07:47 PM
