| Author |
Message |
Grant Goold (65.73.182.24)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, August 18, 2003 - 10:55 am: | |
Any suggestions on changing out my VH-9 on a 6v71 to? I would like to have something that bolts up fairly easily and perhaps gets me a few more miles per hour.
The powerplant is in excellent shape and sits in a 4517 transit. A while ago someone mentioned a 740 with a specific gear ratio but I cannot find the email.
thanks
Grant |
RJ Long (Rjlong) (24.127.74.29)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, August 18, 2003 - 11:38 am: | |
Grant -
The HT740 will NOT work in your GM transit, it's designed for the straight thru T-drive units.
You have your choice of the V-730, a three-speed with lockup torque converter, which will bolt right in with the least amount of hassle. Your other choice is a Voith unit, which is a four-speed. Voith's are electronic, so that might create an additional challenge.
HTH,
RJ
PD4106-2784
Fresno CA |
two dogs (67.30.23.123)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, August 18, 2003 - 1:01 pm: | |
v-730 for sale on other board |
Phil Dumpster (12.230.214.167)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, August 18, 2003 - 1:38 pm: | |
That was me, and no not an HT740 but the V730 with the .875 to 1 angle drive ratio.
Another possibility is the VS2-8 which has a taller overdrive ratio which means you'll go faster, I think it's .75 to 1. Problem is that they haven't been made in 25 years and parts are difficult to find, although the units are cheap ($500 from Nimco) for that reason. If you have a place to store stuff, you could get a few to use as spare parts sources, although they are generally bulletproof to begin with and once you have a good working unit it will probably stay that way for a lot of miles.
Another possibility which will probably be cheaper in the long run is to find a transit coach at auction with running gear you like and either transplant it into your 4517 or convert that bus and dispose of your 4517. Grumman Flxible coaches are starting to show up at auction with Cummins 4 cycle power and Voith or ZF transmissions. You can find such busses at auction directly from the transit agencies themselves for less than $1000.
Do remember your existing engine rotates counter-clockwise, so that means you are stuck with the Allison automatics (except the RH series) and the Spicer 4 speed as used in the PD-4106 or later parlour coaches. Voith and ZF transmissions as well as the Allison RH series are designed to work with a clockwise rotating engine such as you'd find in a car or a truck, and you won't be able to use them with your current 6V71 engine.
Whatever you decide to do, bear in mind that engine and transmission swaps like this are not a trivial thing, and involve a lot of work and if you have to pay someone to do that work, it can add up to some serious bucks. Unless you have worked on medium and heavy duty trucks and busses, you may find doing it yourself to be very difficult. Just the size and weight of the components involved means you need either a few extra people around to provide help lifting stuff, and probably an assortment of heavy lifting apparatus such as jacks, floor cranes, winches, hoists, you name it.
If you haven't started your conversion on the 4517, you may want to consider finding another bus which has running gear more suited to what you want and sell the 4517 or use it for something else. |
dougthebonifiedbusnut (136.217.0.198)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Tuesday, August 19, 2003 - 3:18 am: | |
Hey Grant,
I have some 4517 parts, all the front winshield glass If your not to far away you can have the stuff and I loved my 4517 but it was just to far gone to deal with. good luck |
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