Nev Venture (NV) Transfer Cases

[Ocean Guy]

Are you having problems with the New Venture front transfer cases?

 

There is a discussion going on NV transfer cases on Diesel Place. The steel clip, which holds the oil pump housing in the transfer case, brakes in time and then starts rubbing the magnesium case, eventually, creates a hole on the magnesium case (+70,000 miles starts as a pinhole then enlarges). Increasingly, you lose oil (transfer case fluid) through the hole, and if you don’t notice the oil leak or check the oil level, you fried the components in the case.

 

Looks like, this problem is very common, and they developed a solution, a beefy pump housing that reduces the vibration, which causes the steel clip to break.

See Merchant Automotive transfer case pump upgrade now available. http://www.dieselplace.com/forum/showthread.php?t=95139

 

I searched this problem in our forum, couldn’t find any. Wondering, if the problem is related to the diesel engines, which generates more vibration than the gasoline ones? Any ideas?

[billo52]

Well, it looks like I will be repairing the t-case soon. I had an oil leak, found a pinhole in the t-case. I temporarily patched the hole with some metal filled epoxy and changed the AutotrakII fluid. It should be ok for a while until I get time to fix it. I only lost about 500ml of fluid. Thanks for the link to the Diesel forum and the part to permanently fix this.

[billo52]

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[billo52]

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[Chev454ss]

Ocean Guy

 

No it isn't unique to diesels. I have a 99 Yukon with 251,500 miles on it and right now I'm getting it repaired for the leak that rubbed through the side of my tfer case. 5.7 litre gas engine. I'm getting a new transfer case hat, bearing and seal, along with the fix for the clip that caused the original problem. I had a 90 deg break in the case approx 1/8"x1/8". Damn bean counters any way!

[2002chevy]

I'm dealing with this problem again for the second time. I wish I knew about this forum the first time. Luckly I didn't wreck it either time. Approx 80k mi. the first time, now 140k. The dealer fixed it the first time. They knew exactly what the prob. was the first time I talked to them. They will not get the work this time. Thanks for all the post to read. I'm going to look further to see to fix for this. By the way it's an 8.1 gasser.