Quote:
Originally Posted by RustyBucket
If you find that your truck is lazy or doesn't want to cruise comfortably in O.D. you might pull the shifter down 1 bump and run third gear. 3rd gear on the 700r4 is 1.00.... just like a 350 turbo in top gear. The 700r4 has a good low first gear(3.06) to get your truck rolling.
I have a 700r4 w/3.08 rear in my '71 GMC and a mild 350 engine & it's responsive enough. It really drives better & gives better mileage if I don't let it go into OD unless I'm running 70+mph. on the Interstate. It's on275/60/15's. Yeah, I'd like to have a 3.73 posi in the GMC & the Blazer both but can't justify spending the $$$$.
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I will do that if it wants to down shift a bit m,uch, or if I'm trying to pull a trailer or something of that nature.
It'll do 65-70mph without begging to downshift most of the time. But 75 is the sweet spot for flat land.