I Have a 96 Toyota T100 lifted on 33's. I want to do an SAS and would like any information on this upgrade. I have found a Chevy 6 lug Dana 44 to match my rear axle. I want to run 37's. I was wondering which would be better 4.88's or 5.13's. I have seen other forums with the T's running 4.88 but I feel like that might not be enough. Any suggestions?
5.13's... as long as you remember you can only use 4wd in slow speed offroad / very slippery situations. (unless you get a matching 5.13 rear axle). The mismatched gear ratio's will bind up your driveline.... I'd only go 4.88's if you had a V8...
I wouldn't run different gears. I will replace the gears in both my stock rear axle and the Dana 44 I will use for the swap. Most of the forums I have seen for this upgrade all run 4.88's.
For the Dana you can only run 5.13 or 4.88, for the toyota you can only run 4.88 or 5.29. If you want to have matching gears, you have to run 4.88's, or swap both axles to the same type (both toyota or both dana).
Go 4.88 then. 37's are IMHO too big for 4.88's on a stock motor, but if you see a supercharger in your future it will work OK.
That's what I was thinking about the 4.88. I was hoping I wouldn't need to replace both axles tho. Another question that has been puzzling me is what front drive shaft will work once the front axle is moved forward?
You want a 5.29/5.38 combo since it's a much closer match than 5.29/5.13.
I've got 5.29/5.38 in my 4runner with 37's and the 3.4 V6. It's a better setup than 4.88's if your goal is a lot of off road driving. On-road with 5.29's the rpm's are a little high so freeway gas mileage suffers... but if you're running 37's gas mileage probably isn't your primary concern.
Also, the mismatch between 5.29 and 5.38 is only 1.7%. Not enough to worry about. I've been running it for well over a decade without issue, and many others have as well.
You can buy a flange for the D44 that will allow a Toy shaft to bolt up, but most likely you will be doing something custom for the front shaft anyway since if you run shackles at the rear of the front springs like most do, you'll probably be needing a long travel slip yoke.
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