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04-20-02, 09:45 AM
#1
texasram
tranny modulator
I have a 91 chevy sportside with a 350 engine. the tranny is a 5 speed w/OD automatic. I don't know what type exactly. I want to know what does the transmission modulator do and how do you know its time to replace.
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04-20-02, 11:51 AM
#2
Billdo49er
It modulates the shift.
If vehicle is not shifting when it's supposed to then it may be time to check it out.Not just relace it.
If vehicle is not shifting when it's supposed to then it may be time to check it out.Not just relace it.
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04-20-02, 01:12 PM
#3
Joe_F
As I recall, this is a 700R4 transmission, which is a 4 speed overdrive. It doesn't use a modulator. There is no 5 speed automatic in this vintage truck 
The TV (throttle valve) cable adjustment is critical for good shifting. If it's off, the transmission becomes lunch in a heartbeat.
See the links/posts in my signature file for some information on adjustments.
Only a THM400 would use a modulator, and that is not the transmission in your truck.
The TV (throttle valve) cable adjustment is critical for good shifting. If it's off, the transmission becomes lunch in a heartbeat.
See the links/posts in my signature file for some information on adjustments.
Only a THM400 would use a modulator, and that is not the transmission in your truck.
Last edited by Joe_F; 04-20-02 at 04:03 PM.
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