Having issues jumping the car sometimes nose high then nose down my 22 jumps so much better what can I do to prevent that

How often do you guys change the gears inside your diff? My diff started making noise when I squeeze the throttle (on power) kind of like when your pinion & spur gear mesh is to tight. Pulled the diff apart, cleaned everything & sanded the groove out of my rings. Put it all back together with fresh thrust bearing balls. Still makes the noise. It's not the honking noise from a slipping diff. That is what has me puzzled. Slipper is set to pull the front up about 1-2".

Couple questions for you guys, I am getting my FTB4.1 today (the post office had lost the box for over a week and a half)

I am going to be running a grear diff in it (got one in my T4.1 as well) what fluids are you guys going with for a med/high traction tight indoor track? Local guys are running 3k in their trucks.

Now onto batteries will a 30c rating pack be enough for stock 17.5? Plan to go with GensAce I have had great luck with them in my 1/8ths as well. I am not even close to the fast guy at my track .... still working on driving skills so keep that in mind.

One more thing do you guys know what size bearings are used in the front wheels for the B4.1 and T4.1? I got a bearing kit from Avid and did not look to see if those are included or not Either way I would like to order up a few extras to have.

I run Ofna 3,000 diff oil in my B4.1 Gear diff. It feels just as smooth as a ball diff

The battery will be fine.

for stock....the more punch you have at your disposal, the better off you will be....stock has become a gear war and it's all about holding corner speed

Littlejohn check out the nanotechs,my friend runs them in his sc104x4 and says they have way more punch then his peak 45c,pretty cheap to!

Also not ROAR approved yet. Which does not matter for club racing but it does matter for the Roar events I will be attending this year.

replace them if they are making the noise,it wont hurt anything but its just a whining noise

i need more steering on my t4.1. which front caster blocks and steering blocks are you guys using for maximum steering?

thx

Quick question, hoping someone can help me out. Could one of your guys measure the new shocks center to center, front and rear, without limiters please and thanks? I'd like to start putting together parts for a project but I don't have my gear in Spain with me, it's in Germany currently. Thanks in advance!

Its the big gear. They get out of shape. My dads b4.1 was making a noise so we put a newer gear and sanded down the top shaft spacer. Now it is as good as new.

I know what you mean,I picked up 2 promatch shortys and there not roar approved either,

Most guys running B4.1s are using 30° caster blocks and trailing steering blocks. For Truck advise check the Truck thread.

Hey guys ran my b4.1 with the bb springs for the first time yesterday and noticed my car did not react as well over the bumps as with the stock springs I am running silver in front and yellow in back also running 23 mm ride height and 30wt shock oil in front and 27.5 in the rear, piston 2 in front and 1 in rear

20 Smoke- that was my first thought.
Matt Ward- Big gear meaning the one the diff balls sit in?

I have the idler gear. Will pick up the others. Thanks for your help guys.