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Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Transmission - Rearend> How to make a tranny lube pump ?
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Topic Review (Newest First)
12-07-2012 09:59 PM
paul crispino
Tranny Lube Pump

I have been wanting to build a tranny lube pump for my Geo Storm so I can tow it behind my '79 GMC Motor Home (400 SB). The RV pump that cost about $1k looks like it uses a standard RV water pump which cost about $100. The pumps run on 12 DCV and come in different GPM rates. Other than the pump some 3/8 hoses two valves, a tee fitting and a nipple which needs to be fitted to the trans oil pan will be needed. I will write more when I finish installing and testing the pump. Also you should install a low presure switch and connect it to the cars horn so it will beep if the pump fails.
12-19-2011 07:33 AM
Choptop26 That's a great idea . I'm sure I have an old pinion yoke somewhere . That is a nice neat way of securing the bearing caps and the driveshaft . Maybe I can mount the yoke in a way where it can spin freely to avoid breaking anything . Thanks for the idea . Chuck
12-19-2011 07:07 AM
T-bucket23
Quote:
Originally Posted by Choptop26
The driveshaft disconnect is interesting . Much more dependable than a pump but still kind of pricey . I'm thinking of mounting a bracket of some sort under the rear of the car where I could just pull the u bolts on the rear u joint and secure the back end of the driveshaft in the bracket to hold it up and out of the way . But still leave the slip yoke stuck into the tranny so I don't lose any fluid or get any contaminants in it . That way I wouldn't have to completely remove the driveshaft and have to find a place to store it and also have to plug the tailshaft too . At least that's the direction I'm leaning until somebody throws a better idea out there .
That would work. Just dont forget to secure the bearing cups somehow. Maybe you could get an old rear end yoke and secure it to a bracket and just bolt the shaft right to it. Just dont forge to reattach the shaft to the rear before ou try to move the car or you willl break something for sure
12-18-2011 07:40 PM
Choptop26 The driveshaft disconnect is interesting . Much more dependable than a pump but still kind of pricey . I'm thinking of mounting a bracket of some sort under the rear of the car where I could just pull the u bolts on the rear u joint and secure the back end of the driveshaft in the bracket to hold it up and out of the way . But still leave the slip yoke stuck into the tranny so I don't lose any fluid or get any contaminants in it . That way I wouldn't have to completely remove the driveshaft and have to find a place to store it and also have to plug the tailshaft too . At least that's the direction I'm leaning until somebody throws a better idea out there .
12-17-2011 08:07 PM
Cape Cod Bob I have seen a driveshaft that the RV co's have that diengagies the drive shaft (eliminates removing it)while towing and must be less then the pump.
found it, $750
http://www.hitchsource.com/remcos-dr...u-p-30332.html
12-17-2011 04:06 PM
Choptop26
You're right

I got to thinking about it and came to the same conclusion . It's just not worth it . Thanks for the input .
12-17-2011 09:58 AM
T-bucket23 Its a lot easier and safer to just pull the drive shaft. if the pump dies and you dont realize it you will be buying a tranny. Not worth the risk
12-16-2011 05:25 PM
Choptop26
How to make a tranny lube pump ?

I want to tow my coupe with all four wheels down with a tow bar . It is a small block chevy with a 350 TH automatic and a nine inch Ford rearend . Looking around on some of the RV boards I've seen that they install a fluid circulating pump on the transmission and tow it in neutral with no damage . That sounds good to me but the pumps they sell cost around $1K and that just ain't in the budget . I know there are some very sharp tranny guys on here that could probably tell me how to make my own system for cheap . Like what kind of pump to use and how to plumb it in . How many gallons per minute/hour it needs to flow etc. etc. Maybe where to get one . Thanks in advance guys .

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