Posted By: buck440
727 question - 03/06/13 09:03 PM
ok tranny guy's im wanna pick your brains. heres my uestion i have two big block 727's ones from an rv u know short tail shaft. how hard is it to swap tailshafts to make this a long tail also ??
Posted By: Guitar Jones
Re: 727 question - 03/06/13 09:53 PM
Swap the tail shaft and the output shaft. You will need to disassemble both transmissions but it's not hard.
Posted By: dOc !
Re: 727 question - 03/06/13 09:53 PM
The trans has got to be completely apart. R U able to do that ?
Posted By: mrsmallblock
Re: 727 question - 03/06/13 10:59 PM
front pump pullers and inside/outside snap ring pliers should be all you need for specialty tools.
Howard
Posted By: MR_P_BODY
Re: 727 question - 03/06/13 11:05 PM
Pump pullers (slide hammers) can be made from threaded
rod and some round steel or alum
Posted By: PC-CHARGER
Re: 727 question - 03/07/13 12:27 AM
To remove the pump, simply cut off about 1 inch or so of the threaded part of two 5/16" UNC bolts and cut a screwdriver slot in them at the top. After removing the pump bolts, screw these two short "studs" into the two puller holes using a thin flat screwdriver in the slot you cut. These "studs" screw into the transmission case. Now take two 3/8" UNC bolts and screw them into the threaded pump puller holes and wind them down evenly and they will push the pump out.
Posted By: buck440
Re: 727 question - 03/07/13 12:48 AM
sounds easy enough whats the worst that can happen right lol
Posted By: 440Jim
Re: 727 question - 03/07/13 02:20 AM
The Torqueflite transmission is one of the easiest automatic transmissions to work on. To change the output shaft (main shaft) and the extension housing (tail shaft housing) doesn't take any more special tools than others have stated. To actually rebuild one, you need a couple more things like a front clutch spring compressor, bushing drivers, dial indicator, etc.
Snap ring pliers (inside and outside) and good general mechanic skills together with the factory service manual or an aftermarket instructions/video are fine. Take your time, keep all the parts in the order you removed them (a large work bench is helpful), and you can get it done. Don't flip parts over or mix them up. Some parts will go in the wrong place. But if you are careful, it isn't rocket science.
Posted By: DaveRS23
Re: 727 question - 03/07/13 04:07 PM
To remove the front pump housing, I just pull the valve body and tap it out from behind with a long extension and hammer.
The output shaft snap rings are probably the biggest challenge without the right kind of pliers.
Posted By: RobX4406
Re: 727 question - 03/07/13 05:19 PM
Get the pump out? Don't need no stinking slidehammers.
Stand the unit up on the bell and tap/hit the tailshaft with a dead blow. The pump will fall out. I stack up some wood or towels so it doesn't drop out all the way, give it about a 1" drop.
Posted By: buck440
Re: 727 question - 03/11/13 01:47 AM
next question. may be using the rv trans any difference in low gear sets or such ? any like 5.0 ratio lever for kick down? or should it b the same as a passenger car trans?
Posted By: John_Kunkel
Re: 727 question - 03/11/13 09:10 PM
No factory 727 ever had a low gearset and only the Hemi 727 had the 4.2 and 5.0 lever.
The RV (truck) transmission is pretty much the same internally as a HP big block trans.