results from a rear end swap

[68 TT]

Originally Posted by 3r!c84

yea i got a 3.42 in my 305 th350
wish i has a OD

Try 5.13's and no overdrive

Even with 32" tall tires I am at 3800 rpm at 70 mph.

Overdrive is high on my priorities list but I drive mostly in the city and crawl around in the mud & snow so the gearing is great for what I do most.

[glock35ipsc]

Originally Posted by glock35ipsc

4.11 = 2250rpm @ 65mph

Originally Posted by 68 TT

With only 28" tires the 4.10's would be OK with the OD of the 700R4. I ran these in my Malibu with a T-350 and 28" tires and 60 mph was right at 3000 rpm. The 30% OD of the 700R4 would drop that to about 2000 rpm.

Pretty close.

[spaseghost]

Originally Posted by nlped

If it is the stock rearend it is an 8.5" 10 bolt w/ 28 spline axles. I don't really know why this is relavent, but that's the answer to the previous post.

i didnt want to search and i didnt want to be the a hole who asked. i thought it was a pretty clever way to find out!

[shrtbx]

Whatever works best for ya man lol.

[68 TT]

The 88-up new body style trucks had 30-spline 8.5" 10-bolts but shared the same ring & pinion as the older cars & trucks with the 28-spline 8.5 so it is a nice upgrade if you are breaking the axles on the 8.5 rear end.

[glock35ipsc]

Plus they are wider, so they fill out the wheel well better and bring the front and rear track width closer. See nlped's build thread. He has an 89-98 rear in his truck.