skinny z

A question to any of those with experience here.
Can a rotor from a 13 vane pump (such as from a 4L65E or a late 4L60E) be installed in a 10 vane pump housing with a 10 vane pump slide?
I can across an excellent deal for a billet 13 vane pump rotor and was told by the manufacturer that it's a "drop-in replacement".
Drop-in is relative though.
Transmission is a 91 4L60.
I came across this tech article at Pro Built Automatics. It touches on the subject but my year of transmission is excluded from the conversation.

http://www.700r4l60e.com/forum/viewtopic.php?f=3&t=5

If it's a matter of getting a 13 vane pump slide to go along with the rotor and dropping them into a 10 vane housing (checking side clearances of course), then that's easy enough. If it's question of having to adapt a 13 vane pump housing into the 91 case, I'd rather not.

articwhiteZ

iTrader: (56)

if its for a DD and stock ok.. but don't use it if your going to put power to it...

paulo57509

See the third post in that link, last sentence. I think this is relevant regardless of model year transmission.

articwhiteZ

iTrader: (56)

it does not tell you they fall apart/come apart if used with HP...they are weaker then the 10 vein.
$200 for a billet 10 Vein pump is not for every body. but if ya want it to hold up...just sayn

skinny z

All good points and...

I've picked up a billet 13 vane pump rotor to add to the 10-vane pump slide and case. That should resolve the points addressed in the quotes above.
I've no fear with the billet part though. 13 vane or otherwise. Excellent price too for anyone that's interested.

http://www.tcsproducts.com/products/...ne-pump-rotor/


TCS Billet Rotor

Research here, (and just about anywhere else I could ask), say that the rotor is a drop-in replacement. My builder says no trouble either.
The most significant part of all this is that GM decided it was necessary. It's not likely they're making a change for the sake of change. Just like the 5 pinion planetaries. It's all for the greater good.

articwhiteZ

iTrader: (56)

that's a good price for a billet pump ($150)
if ya go for all the latest and greatest parts it runs $3000+

the converter is about $700 to $800 of that price.. billet..


this unit is getting a trans brake


and with that 1350 U Joints and larg barring 3 members..(for the trans brake)

this pinon yoke is getting swapped out for a billet unit...black unit below is billet 1350

TTOP350

iTrader: (8)

Guess I'm going to have to do some work on my trans again to bring it up to snuff...

skinny z

That's a helluva a pile of parts you have there.
I'm guessing that excluding the convertor and the transbrake, I have about 2/3 of what you have there. All new ACDelco 5-pinion planetaries with reaction gear and Torrington bearings. Steel apply pistons (instead of aluminium). New and reinforced input drum. 29 element sprag. Wider bushings (sun gear and stator support). My hope is that I'll be limited only by the strength of the input and output shafts. And at my current power levels and as far as I can see going forward, this should stand up.
The converter splines went away due to a combination of a mismatched shift kit/pressure trim and a lot of miles (close to 50k!).

skinny z

Upgraded parts availability has come a long ways for the 4L60/4L60E even in just the last few years. Sonnax is still actively developing parts for them (insofar as I know). That you can bring in parts from the later versions like the 4L65E and it's 5-gear planetaries helps a lot.
Looking at the way Arctic is building his, it'll take about as much punishment as you can dish out until you get into forced induction. 650+ ft/lbs is very doable.

TTOP350

iTrader: (8)

I have the 5 pinion planets and my trans has quite a few other upgrades as well but like you said, the new parts keep coming for them.
Need to focus on a few other projects and then will revisit my trans to freshen it within a yr or so.

articwhiteZ

iTrader: (56)

I have done all the hard parts they make.. and added the 5 pinon planet... and added the 6 pinon planet to make it a close ratio. so its like a th350/th400 when going into 2 and 3rd gear. so I don't get the RPM Drop...did the billet input shaft.and cryo treated the output shaft.as nobody makes a billet one.. but nobody seems to be braking that part.just wana make sure... this 700R4 has no kick down..per trans brake..
none lock up..dont need it.. made for the guy who likes to shift it himself...lol..the guys at sonnax and truetec say they are getting the parts to hold up the 800+ hp on track cars. we will see..just want to drive it...

the nexed trans is a aftermarket th400 case and transbrake.or a glide..but that's after a 632cid bbc...

skinny z

Regarding the close ratio planetary gear set. Yes, the large drop from first to second doesn't help my ET. I've deliberately moved my shift point to 6500 to help but what I know is that with the previous engine (and small cam that peaked at 5500), I was well past making power at red line. That was the reason I moved to a larger cam (that and the fact that I already had it) that moved peak power closer to 6200.
That said, what I found with the Monte Carlo (similar engine, drive train and weight) is that RPMs never drop below 5000 even with the wide ratio split of the 700. The Yank made a measurable difference in ETs when compared to the TCI. That's what a properly spec'd torque converter will do for you. This is something I'll need to address when this transmission gets reinstalled however that'll have to wait as another TCI 10" is going in place of the one that expired and started this whole rebuild and upgrade process.

articwhiteZ

iTrader: (56)

Taking advantage of RPM in cubic inch displacement on the small block.. Large mechanical roller good set of 220 Eliminator heads.. 1st 2nd and 3rd gear ratios more in line with a close-ratio for improved pulling power through the 8th Mile and quarter-mile.. It takes a combination of a lot of parts set up the work well together.. And the cost.. Well that's part of the game.
As we don't run tires under 28 inch tall...

skinny z

The plot thickens.
Here a few replies to my original question. Some say OK, do it. Another is a warning no to.

http://ls1tech.com/forums/automatic-...e-housing.html

http://www.700r4l60e.com/forum/viewtopic.php?f=5&t=438

Now I'm at a loss.