So last night i popped my 3th diff......yes i said it, my 3th. I was out on a joy ride and took off and shifted around 8200 into 2nd and POW!

I am wondering what i need to do to make this thing "bulletproof". I have owned 3 RWD cars and i own a is300 as my daily and i have never had any issues. I know my driving style has something to do with it but i am not a hard shifter. I drive the car maybe once a month. I was last using Lucas 75w90 i believe.

I remember reading last time my diff popped about a "puddy" mod but i can not find any information. Also i know that richmond has a 3.57 gear out that is supposed to be more durable than stock but i cannot find that for sell either. Ricks sold it years back but it doesn't look like he carrys it anymore.

Here are my thoughts:
1. Do the puddy diff mod if it is still around
2. Find a set of the richmond gears and get them cyrotreated as well as get the diff reinforced (i think comptech has a kit or something)
3. throw another stock diff in and sell the car

I am in the dark right now on the best option. I would really appreciate your guys thoughts. I am sure there is more options out there so i would like to hear what they are. Share what diff fluids are best too, so far i have tried RP, mobile 1, and lucas (all 75w90) and they all failed. Thanks in advance for the help!

 

Did you replace your previous diffs with used ones?

 

Yes, every diff i have had have been used. Also the last 2 i had in there were supposed to be out of ap2's which i know were rumored to be slightly stronger. I have opened up both a ap1 and ap2 diff and never noticed any differences though.

 

p.m. S2KPUDDYDAD about a 1.5 diff with upgraded hard ware ,polished gears and a "4.57" gear(richmond) our cars are stock 4.10 a 3.57 is nuts hahaha i think the price for the diff is about $1700

 

You can upgrade it to an ap2 diff housing aut thats a puddymod 2.0 territory...and btw youll get $200 back if you send hjm your blown diff...you get $400 back for a good one. Hope this helps you

 

Get new parts not used and use this

http://www.ricks2k.com/products/le1605.php

 

Well i have a good diff laying around but i don't see the point in throwing it in if i'm just going to destroy it in 10k. I will PM him. Any more ideas anyone?

 

109k on mine and always used the aforementioned suggested lube YMMV

 

puddy builds the diff's almost 3x stronger than oem, and he cryo treats and puts on better bearing caps and a solid steel crush washer...its money well spent..plus he sets them up to not whine ; )

 

weird, mine also went out on me lastnight except i wasnt taking off. i just got off of the highway and it started clunking ...i wonder if they sell any of that DUOLEC stuff in local auto stores?...