The Rodding Roundtable
Motorhead Message Central => Rodder's Roundtable => Topic started by: acr on 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.
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....
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.
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.