I was reading a thread about a week or so ago about free diff cup upgrades directly from HPI for X owners.Just wanted to say thanks for this helpful forum that you guys have going here.By the way I e-mailed HPI requesting the free upgrade and the diffs are in the mail,shipped today!

Were all glad we can help. This is probably the most informative and helpful forum I have ever been on.

how long did it take for them to replie i just sent them a e-mail i have just went threw two rear and one front diff yesterday[&:]

Just received mine in the mail Friday but kind of nervous about fixin' what aint brokin. I also have never been in the diffs and the instructions make it seem a bit more difficult then I thought.

On a side note, do I need to buy extra shims or is what is provided in the upgrade bag enough ?

Thanks

I guess I am lucky with well over 7 gallons on my Savage the only diff I messed up is from the bearings going bad about a gallon ago. I do have the diff kits with the alloy cups then next time I go in to change the fluid I will install them but right now still running the stock plastic cups with all that run time on them.

the upgrade comes w/ plenty of shims. I use all of them. be sure to use diff lube vs. grease.

anyone got the email , and what should i put in it , lolol,.,., ive gone through 2 sets of diffs for no apparent reason now , and im tired of them ,

took about a week for the reply.

call them up if you can its faster.