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31s and transfer case upgrade

  • Jimima
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09 Feb 2023 04:52 #247457 by Jimima
Replied by Jimima on topic 31s and transfer case upgrade
I had a play on the Jeepers creepers page but can’t really tell how it helps me. I just want to know if i put a samurai tranfer case with a trail gear 4.19 gear kit in it and slap a set of aggressive 31s on if I’ll still be able to climb steep hills or if I will be able to do it better than standard on the 215/75s or if I’ll create an unworkable loss in torque.

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09 Feb 2023 08:37 #247459 by sniper
The VVT gearbox (R72) doesn't match the ratio's for the chain or sj transfer boxes, I'm no mathematician and can't explain the gearing but I have seen others do it and be unhappy.

To put a VVT (4.3 diffs) car on 32's and have a useable low range, you need to change the gearbox to the pre VVT (R7ME) gearbox. Standard chain drive transfer box and away you go. I run this set up with 30's and its under geared, wants 31's / 32's.

Fitting an SJ transfer box or lobster would want pre VVT (3.9) diffs. I have a lot of friends with this combo and they are very happy.

sniper

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