t-case rumble

[ryanroo]

i have a np205 in my truck behind a NV4500. it is fairly quiet about 60 or so but around 70+ MPH it gets pretty growly. it quiets down if you put a little pressure on the shifter. is this in the shifter and the bushing or the actual gearcase? any idea of how to quiet it down. also i have no shifter boot right now, just an old pair of shorts plugging the hole. thanks
Ryan

[1969 GMC]

Ryan, when my truck ran both the 465 and the 221's shifters would make noises. I'd usually lean my leg against them to make it stop, but I have seen people wrap pipe insulation around them before, and it works pretty good (buddy's '79 F250 w/ NP435 and NP205 has it).

[Americanrider]

"i have no shifter boot right now, just an old pair of shorts plugging the hole." LMAO Get a bigger pair of drawers? Sorry, had to dig on you for that one.... My whole truck would growl at 60-70 and no telling where all the noise would come from.

Are you running synthetic fuilds or just 80-90? Was that 205 twin-sticked by chance? I also would look at the shifter bushings, maybe throw some nylon washers in there if there is slop.

[ryanroo]

Thanks for the responses. the t-case isn't twin sticked. i htink my problem lies in the busing in the shifter, there is a lot of slop in the shifter, so i think some brass or nylon washers are in order. i have an extra bracket for the NV4500/205 combo from AA so i might try to fab up a replacement pivot point that is better bushed, so to alieviate the noise. thankfully the truck is quiet and smooth other than the shifter, all the way up to 80-85 on the freeway

oh yeah, it has synthetic castrol gear oil in the t-case

Ryan

[mrein3]

If I'm on a road trip I put a work glove or a chopper over the shifter. Around town I just deal with it.

I made some nylon bushings but unless I just pumped it up with grease it makes noise.