towjoe
Full Access Member
- Joined
- Jul 22, 2012
- Posts
- 695
- Reaction score
- 136
- Location
- Lafayette,IN
- First Name
- joe
- Truck Year
- 78,80,81,81,86,88,89
- Truck Model
- K30's or V3500's
- Engine Size
- 6.2, 454
my new c20 burb has a 454 with 400 and 3:73 in it. I figured this afternoon on 100 miles of local driving 10.8. going to try it tomarrow over the road with trailer and car in tow and see how much it differs. I know my K30 on a 400 mile rod trip got 9.6 pulling trailer and car with a 454/400/3:73 and will go 75-80. I run 4:10 gears in all my wreckers that pull since it's about perfect for a tow gear but 70 about top end. 4:56 are alittle steep for on road trips, have a M1028 that's top speed is 57mph
