700r4 Help Needed, Stays in 3rd Gear too Long

Started by acr, June 01, 2009, 10:52:18 PM

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acr

June 01, 2009, 10:52:18 PM
My mild 350 SBC hot rod has 700r4 that works great except for one annoyance. In normal around town driving with a 3.50 rear gear & light throttle it won't shift to 4th until 65-70 MPH unless I let off the gas. It also down shifts to 3rd at about 45 MPH. It has the B&M governor kit w/the green spring & #3 weight.
Should I change the spring to blue & weight to the heavier #2, or just the spring? Any ideas how much either will drop the shift points?
Thanks in advance.

WINGNUTZ

#1
June 05, 2009, 10:48:47 AM
Quote from: "acr"My mild 350 SBC hot rod has 700r4 that works great except for one annoyance. In normal around town driving with a 3.50 rear gear & light throttle it won't shift to 4th until 65-70 MPH unless I let off the gas. It also down shifts to 3rd at about 45 MPH. It has the B&M governor kit w/the green spring & #3 weight.
Should I change the spring to blue & weight to the heavier #2, or just the spring? Any ideas how much either will drop the shift points?
Thanks in advance.

Since I don't know about B&M's kits... I would consult directly with the 800 number... or you might be able to get answers right on their WEB site!

Let us know what you find out....

Crosley.In.AZ

#2
June 05, 2009, 09:32:32 PM
in the governor... the inner springs affect shifts of light throttle the most under 35 mph ( approx) .... lighter springs = later shifts

the inner weights affects shifts the most over 35 mph.... lighter weights = later shifts

there is some variation with gear ratio and tire size  on the 35 mph figure I quote.

3rd gear is fickle in the 4L60 trans... some times a spring change on the actual shift valve inside is needed.
Tony

 Plutophobia (Fear of money)

acr

#3
June 05, 2009, 10:53:20 PM
Crosley, Thanks for the reply, tire diameter is 28", rear gear 3.50. With my gears & tires, & over 35MPH, should I try the heavier weight first? And I will call B&M.

Quote from: "Crosley"in the governor... the inner springs affect shifts of light throttle the most under 35 mph ( approx) .... lighter springs = later shifts

the inner weights affects shifts the most over 35 mph.... lighter weights = later shifts

there is some variation with gear ratio and tire size  on the 35 mph figure I quote.

3rd gear is fickle in the 4L60 trans... some times a spring change on the actual shift valve inside is needed.
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