Hot Rod Forum : Hotrodders Bulletin Board - View Single Post - T-350 conversion to a T-350C
View Single Post
  #5 (permalink)  
Old 01-30-2012, 05:39 AM
stich626's Avatar
stich626 stich626 is offline

Last journal entry: The TwoTonShu #10
Last photo:
Join Date: Aug 2011
Posts: 372
Wiki Edits: 0

Thanks: 0
Thanked 2 Times in 2 Posts
Originally Posted by SSedan64
You can convert a TH350C w/Lockup TC into a TH350 Non-Lockup TC Trans but, not vice versa.
The TH350C's Lockup TC would only drop your Engine's cruising speed about 150-200rpm.
If your Motor Home has a HD 350 Trans it's most likely a TH375B. I'm surprised GM didn't use a TH400 Trans in a C30 MH.

A better option would be a 4L80E Trans or GV/Gear Vendor OD/OverDrive unit. These would give you about 25% rpm drop in OD which would be Ok on flat/level road.

A vehicle like that should have come with a SBC400 or BBC454 Engine & TH400 Trans.
I just pulled a (what I thought was a th350) out of a 70 motorhome.. it was a 350 c.i.d. motorhomewas based offa van nose..
how would one tell a th375 over a th350?