Go5.3tt06

iTrader: (1)

Hey so far I been installed lower my truck. Ride great. But I start nocited when I push gas full to acceleration till pass 5k rpm it'd vibrate alittle when change gear its feel perfect. Only when u push gas when rpm go to 5k they would feel it till they change gear. But when my truck not lower never felt the vibrate. Look like we need a shim or something for my lower on my truck. My truck drop on rear 4 inch. Let me know pls

dlt76028

iTrader: (13)

what did you use to lower the rear? your pinion angle is off and you will need to install some shims.

budhayes3

iTrader: (19)

+1, this is very common when lowering the rear. You can shotgun some 2* shims in there and see if it helps, or you can search this section for "pinion angle" and you should find a bunch of threads with pics that address this concern

Go5.3tt06

iTrader: (1)

I got lower kit from mc grauphy they never gave me shims. Which shim can I find it?

Ketis

iTrader: (2)

you have to measure you're pinion angle to decide what shim you need.

there are threads on here if you do a quick search im sure you will come up with something.

acethedragon

iTrader: (2)

also need to check driveshaft. mine has a 2/4 drop but i pieced mine together. belltech spindles in front with hotchkis 4" leaf pack out back. chose that for carrier bearing bracket and spacer under tranny mount. my driveshaft is perfectly flat and never had any vibration runnin up to 6500rpms and 135mph.

Go5.3tt06

iTrader: (1)

listen, im telling you this is my first time and i dont know how exactly to measure the pinoin angle??? I got shacklet and hangers on it.

dlt76028

iTrader: (13)

Well measuring it is the right way to do it. You could probably get away with a 2* shim

Go5.3tt06

iTrader: (1)

I not understand you. you dont explain clear. Measure what? Length, down, top or what else???

dlt76028

iTrader: (13)

google search measuring pinion angle. i don't know how to be clearer.