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Author Topic: ZF S6-650 transmission  (Read 7941 times)

Offline bowtieman82

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ZF S6-650 transmission
« on: May 14, 2011, 10:50:51 pm »
Has any one ever tried to put a ZF S6-650 transmission in one of there trucks? i would like to put a 5 or 6 speed trany with over driver in my truck, for better fuel Economy, and to Run better down the high way.
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Offline VileZambonie

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Re: ZF S6-650 transmission
« Reply #1 on: May 15, 2011, 08:00:00 am »
The money you spend in the conversion will outweigh the fuel savings. Did one of these fall in your lap?
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Offline ssapach

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Re: ZF S6-650 transmission
« Reply #2 on: May 15, 2011, 10:15:46 am »
I currently have a ZF6 from a 2002 Chev sitting, waiting for a transplant into my 1986 1 ton.

The 6 speed is a 2wd version, I got lucky......34000 km on the trucks odometer and I paid $1000 for the transmission.  I also already had a divorced NP205 sitting around anyways.

The ZF6 is a big transmission, it's tall, long and heavy (about 220 lbs or so) and slightly worries me that I will need a body lift to even fit it under my floor.  Either that or some good transmission hump modifications. 

I wouldn't be looking for one specifically, in fact I would more so lean towards the NV4500 due to its size and availability.  That being said, I found mine by accident and it was the same price as what people wanted for a used 4500 with more miles on it, so I wasn't about to turn it down. 

I'm actually sorry now I didn't take the 8.1L that was bolted to it for the extra $1000 :-\

My bottom line I guess, if you find one cheap and in good shape, go for it.  But if you have something like a 2wd half ton, there are other 6 speed options out there that would do fine.
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Offline bowtieman82

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Re: ZF S6-650 transmission
« Reply #3 on: May 15, 2011, 12:51:25 pm »
i found one in a wreck truck 4x4 all they want is 300 for truck.  it got better gears ratio  and over driver i just want to know how much bigger is it them my ms465 and will my 208 will bolt to it be for i buy it.
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Offline ssapach

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Re: ZF S6-650 transmission
« Reply #4 on: May 15, 2011, 06:06:47 pm »
I hate to say it, but it might be easiest to take the transmission with the t-case thats currently on it and covert your truck to a drivers side front diff.

I've seen a thread in the past about someone who mated an NP205 to the back of an Allison.  The ZF-6 has the same rear end as the Allison in the 4x4 applications, so if an adapter can be done for the Allison then the ZF shouldn't be a problem either.

Therefore, if the NP205 can be used, an NP241 can be used as well.  Not too sure about the NP208 though.

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