Borg Warner super t10 in place of 3 speed - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**MikeB** · 09-01-2024, 02:48 PM

About the gear ratios, I found the info below on the 3-speeds. 0-3 are the number of grooves on the input shaft. I would guess your six-cyl trans is 3.11 or 3.50, assuming it's original.

.................................1st 2nd 3rd
Saginaw 3-speed – 1 2.54 1.50 1.00
Saginaw 3-speed – 0 2.85 1.68 1.00
Saginaw 3-speed – 2 3.11 1.84 1.00
Saginaw 3-speed – 3 3.50 1.89 1.00

So compare total torque multiplication (1st gear ratio X rear axle ratio) to see which one will work best.

70 shorty · 09-02-2024, 10:55 AM

Thanks for all the replies. I will research further in respect to the gear ratios and input spline count.

09-01-2024, 02:48 PM	#1
MikeB Senior Member Join Date: Jul 2000 Location: North Texas Posts: 3,568	Re: Borg Warner super t10 in place of 3 speed About the gear ratios, I found the info below on the 3-speeds. 0-3 are the number of grooves on the input shaft. I would guess your six-cyl trans is 3.11 or 3.50, assuming it's original. .................................1st 2nd 3rd Saginaw 3-speed – 1 2.54 1.50 1.00 Saginaw 3-speed – 0 2.85 1.68 1.00 Saginaw 3-speed – 2 3.11 1.84 1.00 Saginaw 3-speed – 3 3.50 1.89 1.00 So compare total torque multiplication (1st gear ratio X rear axle ratio) to see which one will work best. Attached Images __________________ Mike 1969 C10 LWB -- owned for 35 years. 350/TH350, 3.08 posi, 1st Gen Vintage Air, AAW wiring harness, 5-lug conversion, 1985 spindles and brakes. 1982 C10 SWB -- sold 1981 C10 Silverado LWB -- sold, but wish I still had it! 1969 C10 (not the current one) that I bought in the early 1980s. Paid $1200; sold for $1500 a few years later. Just a hint at the appreciation that was coming. Retired as a factory automation products salesman. Worked part-time over the years for an engine builder and a classic car repair shop. Member here for 24 years! This is the very first car/truck Internet forum I joined. I still used a dial-up modem back then!

09-02-2024, 10:55 AM	#2
70 shorty Where's my beer? Join Date: Oct 2004 Location: Glen Allen, VA Posts: 1,772	Re: Borg Warner super t10 in place of 3 speed Thanks for all the replies. I will research further in respect to the gear ratios and input spline count. __________________ 70 C10, shortstep, .30 over 250,Hurst shifted 3 spd parts hauler. Holley 390, Clifford Intake, Header, ported cylinder head, unknown bigger cam. 79 Corvette L82, 4 spd, black, red interior, headers, flowmasters, and unkown bigger cam. '03 Grand Cherokee Laredo, 4.0 4x4 daily driver. 165K miles, and runs great '08 Tahoe LTZ 4x4 155K



Register or Log In To remove these advertisements.

Register or Log In To remove these advertisements.