I am looking to change the diff ratios in my SR5 M/T to a 4.1 ratio. I have read the discussions about the various ratios and tyre sizes etc but have not read much from anyone who has actually done a re-diff on a current series. I would really like to hear about;
1. What ratio did you go to and what tyre size are you running. Have you been happy with outcome?
2. Did you use Nitro Gears, Genuine Toyota or other?
3. I have the factory locker in the rear and an E Locker in the front. Will the Toyota or Nitro Gears be a straight swap?
4. I can't find a workshop that has done this swap. Does anyone know of a workshop in Melbourne that has
done this diff swap?
Thanks for any suggestions....
Timbo…..I regeared my Diesel auto back in Jan of this year.1. What ratio did you go to and what tyre size are you running. Have you been happy with outcome?
I went to 4.8 Nitro Gears. I run 295/70r17 Toyo MT's as daily tyres and I run 35/12.5x17 Nitto Trailgrapplers on Beadlocked 17x9's for offroading. I am very happy with the outcome. Given, the 4.8's suit the 295's beautifully.....on the 35's....the vehicle "feels" like it could dowith a little more but hopefully a future remap will give that little extra bit of torque it needs when on the highway. In low range it is great.2. Did you use Nitro Gears, Genuine Toyota or other?
I went went with Nitro gears and the Master Install kits that they also sell with them. I had good results with Nitro gears on my N70 Hilux and was a no brainer to use them again.3. I have the factory locker in the rear and an E Locker in the front. Will the Toyota or Nitro Gears be a straight swap?
I too run a factory locker rear and E-Locker front. You sir have 3.5 standard diff ratio in the manual. You have two 4.1 ratio options:
1 - Toyota 4.1 - this is a standard cut/thickness gear. If you use this, you will need to swap over your front E-Locker to one that suit the 3.9 and higher ratio'd diff gears as the offset position of the gears is different.
2. Nitro 4.1 - This is a "thick cut" gear, the extra thickness makes up for the offset issue with standard gear thickness and can be used in the existing E-Locker you have. Nitro gears would be cheaper than Toyota (unless you found a second hand set) but even if you found a second hand set, you wil still need to change the front locker so your begtter off going Nitro from the start.4. I can't find a workshop that has done this swap. Does anyone know of a workshop in Melbourne that has
done this diff swap?
I had Brett from 4x4Obsession in Melton do my regear. They've done several of them and I was happy with their customer service and workmanship.Additional Notes:
1. I found that the Master Install Kits from Nitro, like last time, make the install so much easier with everything being on hand. If you use this kit, just buy an additional front diff driveshaft seal because we found one of the seals provided did "seat" properly and a little bit of weepage of oil was coming out. We put this down to possibly a slight difference in this area with the Tacoma's. wasnt a big deal and fixed quickly.
2. Your diff regear is only as good as your run in process....do you research and ensure you take your time with this. IM happy to help when the time comes for advice.
Hope that helps.