GMCforum
For enthusiast of the Classic GMC Motorhome built from 1973 to 1978. A web-based mirror of the GMCnet mailing list.

Home » Public Forums » GMCnet » Governor parts list, THM 425 tranny
Governor parts list, THM 425 tranny [message #83458] Fri, 07 May 2010 10:24 Go to previous message
Surbo is currently offline  Surbo   United States
Messages: 213
Registered: February 2004
Karma:
Senior Member
Howdy;

I have put up a pdf file on the photo site of the parts list for the governors in the THM 425 tranny. Follow the tag code for each tranny, for the vehicle it was used in. You will note the differences in the parts list of weights and springs. Most of the governors I have looked at have a tan colored spring for one weight,light tension, and a purple spring for the other weight, heavier tension. These changes must have been for shift point mph changes and line pressure changes in conjunction with the modulator.

I am about to do some experimenting with changing the weight of the weights, probably by drilling a hole in them, to see if I can raise the mph shift points. This should also be able to be done with the spring tensions, or a combination of the two.

Here is the link to the pdf file;

http://tinyurl.com/23me3dn

Bob Drewes in SESD

 
Read Message
Read Message
Read Message
Read Message
Read Message
Previous Topic: Re: [GMCnet] Arriving at a fair price for coach and, enhancements
Next Topic: Crappy Idle
Goto Forum:
  


Current Time: Fri Sep 20 20:11:04 CDT 2024

Total time taken to generate the page: 0.00786 seconds