Swapping TF 999 for TF 727

[CCTJ]

Hey transmission guru's.
I want to swap a TF 727 in, in place of a TF999.
Is this a swap that dosen't need adaptors etc? I know that the 727 and 999 is the same length and that the 727 pan is larger, however, will they bolt up without major mods.

Thanks
CCTJ

[This message has been edited by CCTJ (edited September 27, 2000).]

[Thunderstruck]

the 727 is about 4" longer than any 904 based auto, that includes the A999. You will need the kickdown lever from a 727 and maybe a different flexplate to hook the torque converter to the engine, or just buy the B&M plate that is double drilled for both.

Don't forget to swap the speedometer pinion over from the A999 so you speedo reads properly, assuming it reads properly right now.

Steve

[RamHead]

Thunderstruck is right, you'll need the drive shaft from the 727 and the torque converter. The BM flex works great, watch out for which engine you are bolting to internal balance or external?

[DartGT66]

And be prepared to loose some go if you are going to use a stock converter. The 904 converters are 11" while most of the 727 converters are 12". Even the 11" 727 converter stalls lower than a normal 904 converter. There are also two different housings for the 727; one for small block and one for big block. There is also a short version of the 727 which is same length as a 904. It was used in some vans but it's pretty rare, I have never seen one. Even with that you need the slip yoke out of the 727. The 727 is way more reliable than the 904, but bigger and heavier too.

[CCTJ]

Thanks for the follow up guys. Do ya'll think a 999 will do OK behind 300 ponies. Not on the strip or any real hard racing like you obviously do. Street driving with an occasional kick in the butt. I understand this tranny was put behind some 318's and 360's by Chrysler. Thanks again

CCTJ

[etracer]

I have a 999 behind my 340 and I've never had a bit of trouble. I run low 11's @118mph and it has held up for 3 years so far. 300hp should not be a problem at all. Also,I had a 999 behind my old 340 that ran high 12's and it was driven on the street,to the track,and everywhere in between without any problems. Good Luck.
http://www.fortunecity.com/silversto...368/index.html

[Tim_K]

I've never seen or heard of a short tailshaft 727. And I can't think of any reason why one would be put in a van, where there is all the room you need for a stock length tailshaft. The only 727 tailshaft I've ever seen that wasn't the standard length was the ones in 4X4 trucks, where the transfer case bolts right on to the back of the transmission. I've heard of short tailshaft 727's in dragsters, but they are custom made. 727 slip yokes were all one size (1.25"), but 904's came in 2 sizes (1.25" and 1.083"). Your 904 MIGHT already have the right one.

[CCTJ]

Thanks again guys. I appreciate all the comments. Think I'll stick with the 999 until it goes tits up. (if it does)

CCTJ

[Hemi Mike]

I run the A999 in my Diplomat. The lock up clutch in the converter acted funny with a 1900/2100 stall speed, so I had it removed. Had the tranny built with clutches, steels and bands from Level 10, and I did a Trans-Go shift kit myself. Shifts real hard at WOT, by itself in "D".

I love this tranny because of the low 1st gear and the large clutch packs. I'll be running the 1/4 mi. next spring and feel confident that she'll hold up. LOL. Good luck!

-Mike

------------------
Stoplight action in a street fightin' '85 M-body 360ci. or '68 Hemi GTX 4spd.

[txs]

Well Tim K, mighty odd that I have a couple of those non-exsisting short shaft 727s. They are short, use a bolt on yoke, and the same mounting pad as the long slip yoke 727s.

[ChristianCuda]

Those are the pre 65 727's

Christian

[txs]

no christian they are NOT pre 65 727s. They made the short shaft 727s as recently as 3 or 4 years ago. Some of the pre 65 727 were LONG shaft with bolt on yoke for ball and trunion. they also made an intermediate lenght shaft with the provision for the parking brake assembly until well up into the 70s. I have seen the short shaft 727s in vans and pickups even the divorced transfer case (205) 4x4s.

[ChristianCuda]

They havent been using the 727 in production vehicles. Where have they been using them? All 727 being used atleast for US vehicles had the slip yoke. I dont know any vans even that had bolt on yokes. Even the 1 ton vans and trucks had slip yokes.

Christian

[txs]

1997 M.Y. van part# 52119540 This is 727 (non overdrive). 1995 M.Y. #3836459 #3836479 #4761029 #4761866. That last part number is a cummins tranny. all 4 of these part #s are short 727 non lock up trannies made during 95 M.Y. 1990 M.Y. #3836195 #3836197 #3836199 #3836200 #3836204 #3836205 #4559158 #53008538 #43506327 are all short bolt on 727 non lock up trannies. I have never seen a dually dodge truck with a sliding spline tranny either auto or stick. Doesn't mean they didn't make them.