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Thread: Manually down-shifting a th350-good or bad?

  1. #1
    Member MASTER JOURNEYMAN
    Join Date
    Oct 2008
    Location
    Desoto, MO
    Posts
    37

    Manually down-shifting a th350-good or bad?

    I bought a th350 that has ~1k on a performance rebuild. On the receipt that came with the trans, it says not to down shift from 3rd. Is this a normal practice with these transmissions? I will be manually shifting the trans fwiw. I apologize if this is a newbie question, I am just getting familiar with the gm trans. Thanks guys.

  2. #2
    Senior Member EXPERT BUILDER
    Join Date
    Aug 2005
    Location
    Tell City, IN
    Posts
    356
    I know it is hard on the sprag to downshift if you are going very fast.
    I was told if you downshift do it easy and at a very slow speed.
    A friend broke his sprag doing it all the time in a Trans Am, He kinda treated it like a stick shift.. :lol:

  3. #3
    Member MASTER JOURNEYMAN
    Join Date
    Apr 2009
    Location
    Florida
    Posts
    38
    You dont have to worry about asking any questions. These guys are alot of help on here.

  4. #4
    Senior Member RACING JUNKIE
    Join Date
    May 2006
    Posts
    2,044
    Quote Originally Posted by us7race
    I know it is hard on the sprag to downshift if you are going very fast.
    I was told if you downshift do it easy and at a very slow speed.
    A friend broke his sprag doing it all the time in a Trans Am, He kinda treated it like a stick shift.. :lol:
    Nice avatar there US, you getting it up there arnet cha? Sweet.
    ***IN GOD WE TRUST***

  5. #5
    Senior Member RACING JUNKIE
    Join Date
    Sep 2007
    Posts
    4,143
    Quote Originally Posted by cepx111
    Quote Originally Posted by us7race
    I know it is hard on the sprag to downshift if you are going very fast.
    I was told if you downshift do it easy and at a very slow speed.
    A friend broke his sprag doing it all the time in a Trans Am, He kinda treated it like a stick shift.. :lol:
    Nice avatar there US, you getting it up there arnet cha? Sweet.
    I swear I think the engine is in the bed....

  6. #6
    Senior Member EXPERT BUILDER
    Join Date
    Aug 2005
    Location
    Tell City, IN
    Posts
    356
    Quote Originally Posted by Tod74
    Quote Originally Posted by cepx111
    Quote Originally Posted by us7race
    I know it is hard on the sprag to downshift if you are going very fast.
    I was told if you downshift do it easy and at a very slow speed.
    A friend broke his sprag doing it all the time in a Trans Am, He kinda treated it like a stick shift.. :lol:
    Nice avatar there US, you getting it up there arnet cha? Sweet.
    I swear I think the engine is in the bed....
    Don't mean to hi-jack the trend..

    lol as far as the engine in the bed. The new tires and carb are coming around. 1.41 average 60' with the rear wheels and a best of 1.37.
    New best time of 6.11@110 and I think it is running out of fuel on the last 1/3 or so of the track...


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