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swb 4 inch lift pinion angle help asap

Tech Talk for Nissan owners.

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swb 4 inch lift pinion angle help asap

Post by waandy »

im just trying to get my shortys shaft running right. i have 18mm longer lower arms and adjustable uppers with a factory shaft not dc. iv started to roll the diff forward and vibs have got worse. do i keep rolling it to the exact right angle or will it be imposible to get right with this shaft? please help asap
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88 tb42 swb mav,35 claws, 4 inch lift
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Post by SIM79 »

Lower the gear box 10-15mm.
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Post by waandy »

SIM79 wrote:Lower the gear box 10-15mm.
gearbox has 4 6mm packers or 24mm.
should i pull 1 or 2 packers out to bring flanges into same angle?
85 hi top drover, 31s, 2 inch exended shackles 2 inch bl.
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Post by mhgill »

waandy wrote:
SIM79 wrote:Lower the gear box 10-15mm.
gearbox has 4 6mm packers or 24mm.
should i pull 1 or 2 packers out to bring flanges into same angle?
Yeah its worth a shot, never heard of using any more than 15mm spacing on G/box
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Post by waandy »

removed half the packers last night. now running 12mm. vibs are not as bad now but i think i still need more fine adjustment. gave up at 2 am lol
85 hi top drover, 31s, 2 inch exended shackles 2 inch bl.
88 tb42 swb mav,35 claws, 4 inch lift
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Post by 80's_delirious »

have you just done the lift?
what condition are your uni joints in? if they are old, the needle rollers can wear into a bit of a groove, lift might have shifted them enough that they now run back and forth over the ridges.

this is more likely in a shorty, coz the shaft angle will have changed by more than it would in a LWB for the same lift

pinion angle should be within a couple of degrees of being the same as the transfer case output angle
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Post by waandy »

80's_delirious wrote:have you just done the lift?
what condition are your uni joints in? if they are old, the needle rollers can wear into a bit of a groove, lift might have shifted them enough that they now run back and forth over the ridges.

this is more likely in a shorty, coz the shaft angle will have changed by more than it would in a LWB for the same lift

pinion angle should be within a couple of degrees of being the same as the transfer case output angle
pinion angle is pretty close to transfer output angle, i will change the unis this week, the lift has been in for a few months, but was running pretty good after the lower arms but im just trying to get it perfect
85 hi top drover, 31s, 2 inch exended shackles 2 inch bl.
88 tb42 swb mav,35 claws, 4 inch lift
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