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73-87 Chevy _ GMC Trucks => Engine/Drivetrain => Topic started by: Joec123able on January 03, 2017, 05:23:30 pm

Title: cold shifting th350
Post by: Joec123able on January 03, 2017, 05:23:30 pm
Is it normal for th350s to barely want to shift when cold and when its cold outside? When I say shifting, I mean shifting from park into drive and reverse. When warm mine shifts hard into gear and when I let off the gas it starts rolling. When cold I shift it, I don't feel it or hear it shift and it doesn't roll. Just now went to drive it, warmed it up for a couple minutes. Shifted into reverse couldn't feel it shift like normal, then hit the gas it barely started moving and made a grinding clunking sound. I went and drove any way and it did fine once fully warmed up, Shifts hard and firm. Fluid is in the safe area and bright red and clean. 73 chevy k 20 350 and 205 transfer case
Title: Re: cold shifting th350
Post by: Stewart G Griffin on January 03, 2017, 07:35:50 pm
Not sure, but i HAVE noticed this in the past few weeks:

Right now, when i first start it up cold and it's cold outside and  the rpms are about 2000----because it's on high idle, when i drop it into gear (either D or R), it sort of gently engages.  It doesn't grab real quick.   (which is good)


However, a few weeks ago i was having problems getting my rpms down to normal because of a choke linkage/fast idle cam problem/out of adjustment.   So after i would drive the truck for a good while and the truck and drivetrain would be nice and warm, i would park it briefly, say to get something to eat.    Then when i would start it up again and put it into gear, it would slam pretty hard into D or R (which i thought was bad).    Remember now, the rpm's were not normal, they were pretty high in neutral----like 1400-1600.   

As far as actual shifting from 1-2, 2-3 etc., i don't notice much difference when the truck is cold vs. warmed up.
Title: Re: cold shifting th350
Post by: gunrac on January 03, 2017, 09:51:54 pm
https://www.wolverineheater.com/    this should work.
Title: Re: cold shifting th350
Post by: FlatBlack77 on January 03, 2017, 10:16:45 pm
www.wolverineheater.com/‎

link doesnt work