transmission tremec 3550

tayzoid1 · 03-10-2008, 10:41 PM

can a tremec 3550 bolt in where a t-5 was some sites say you have to shorten drive shafts on modify cross members im trying to find one so i will have a good bit stronger tranny this is in a 1991 5.0 vert

p.s. any body got one f/s

militarymustang88gt · 03-10-2008, 10:55 PM

um i dont have mine for sale but mine went right in. had to pry the cross member a bit because of the solid trans mount but it was only like a quarter of an inch

coupe · 03-10-2008, 11:04 PM

Should fit right in. I knew a local guy (Bham) with one. Had bellhousing, trans, shifter, etc... I'll see if he has it. He was asking around $1000.

militarymustang88gt · 03-10-2008, 11:10 PM

i know my buddy 88scgt had one till about 2 months ago for sale. call blake walker at walker dyno tune. he might know someone that has one for sale.

LeeH · 03-10-2008, 11:23 PM

Quote:

Originally Posted by tayzoid1

can a tremec 3550 bolt in where a t-5 was some sites say you have to shorten drive shafts on modify cross members im trying to find one so i will have a good bit stronger tranny this is in a 1991 5.0 vert

p.s. any body got one f/s

You have to cut the tack welds on the tubes on either side of the cross member, This allows the cross member to slide back on the tubes and line up with the 3550 trans mount. The T5 and 3550 both use a 10 spline clutch disk but the 3550 uses the same bell housing as the old SROD, My favorite option is the McLeod or FRPP bell which has both the T5 and 3550 bolt patterns.

militarymustang88gt · 03-10-2008, 11:50 PM

the first gen of 3550 had 10 splines and the 2nd and 3rd gens had 26 spline input with 31 spline tail

LeeH · 03-10-2008, 11:57 PM

Quote:

Originally Posted by militarymustang88gt

the first gen of 3550 had 10 splines and the 2nd and 3rd gens had 26 spline input with 31 spline tail

You are 110% incorrect, All 3550s had 10 spline input and 28 spline output. The TKO and TKO2 had 26 spline input and 31 spline output.

If you dont agree then you need to visit TTCs website
http://www.ttcautomotive.com/English...ice_Manual.pdf

LeeH · 03-11-2008, 12:12 AM

Look at page 3, It proves what I have argued with you about now in two seperate threads. I have had both but currently have a 3550 in my 89, I dont fight with people unless they are way off base.

militarymustang88gt · 03-11-2008, 12:28 AM

i called tremec and asked them when i got mine because it had a 3550 tag on the casing and it had 26 spline input and 31 spline output and he said that it was not a tko if it was in the housing of the 3550 and that the 94-95 i think the last two years they did them had the same internals as the tko just didnt have the good case that the tko had

LeeH · 03-11-2008, 12:48 AM

3550 and TKO use the same case, The only oddball case was the early 3550 which did not have all the extra ribbing external for support. The early cases break next to the top mount ears, The newer case has the extra ribbing. You can convert a 3550 to a TKO which requires the TKO input(26 spline) and the mainshaft(31 spline). The tail housing changes to accomadate the larger O.D. of the 31 spline yoke, Or it can be machined to fit the 31 spline output yoke. The input and mainshaft size increase is what makes these transmissions different, The TR3550 is rated for 350Ft lbs Tq while the TKO is rated at 425. The Tremec part number for the TR3550 and TKO case is 2606106. Its the shaft size that changes the the Tq rating of these transmissions.

I posted the address of the TR3550/TKO service manual which is located on TTCs website(TTC is Tremec).

03-10-2008, 10:41 PM	#1
tayzoid1 5.slo stanger Join Date: Jan 2007 Location: oxford alabama Posts: 735	transmission tremec 3550 can a tremec 3550 bolt in where a t-5 was some sites say you have to shorten drive shafts on modify cross members im trying to find one so i will have a good bit stronger tranny this is in a 1991 5.0 vert p.s. any body got one f/s __________________ no mustangs anymore but i do have a 1jz swapped 83 supra

03-10-2008, 10:55 PM	#2
militarymustang88gt Senior Member Join Date: Jun 2007 Location: bham and auburn Posts: 337	um i dont have mine for sale but mine went right in. had to pry the cross member a bit because of the solid trans mount but it was only like a quarter of an inch __________________ finally got my avatar. it is the white one.

03-10-2008, 11:04 PM	#3
coupe Super Moderator Join Date: Dec 2004 Posts: 6,313	Should fit right in. I knew a local guy (Bham) with one. Had bellhousing, trans, shifter, etc... I'll see if he has it. He was asking around $1000. __________________ " If you can't explain it simply, you don't understand it well enough. " - Albert Einstein

03-10-2008, 11:10 PM	#4
militarymustang88gt Senior Member Join Date: Jun 2007 Location: bham and auburn Posts: 337	i know my buddy 88scgt had one till about 2 months ago for sale. call blake walker at walker dyno tune. he might know someone that has one for sale. __________________ finally got my avatar. it is the white one.

03-10-2008, 11:50 PM	#6
militarymustang88gt Senior Member Join Date: Jun 2007 Location: bham and auburn Posts: 337	the first gen of 3550 had 10 splines and the 2nd and 3rd gens had 26 spline input with 31 spline tail __________________ finally got my avatar. it is the white one.

03-11-2008, 12:12 AM	#8
LeeH Senior Member Join Date: Dec 2005 Location: The conservative underground Posts: 341	Look at page 3, It proves what I have argued with you about now in two seperate threads. I have had both but currently have a 3550 in my 89, I dont fight with people unless they are way off base. __________________ 89LX Hatch 89LX Coupe 89GT 90GT 93GT

03-11-2008, 12:28 AM	#9
militarymustang88gt Senior Member Join Date: Jun 2007 Location: bham and auburn Posts: 337	i called tremec and asked them when i got mine because it had a 3550 tag on the casing and it had 26 spline input and 31 spline output and he said that it was not a tko if it was in the housing of the 3550 and that the 94-95 i think the last two years they did them had the same internals as the tko just didnt have the good case that the tko had __________________ finally got my avatar. it is the white one.

03-11-2008, 12:48 AM	#10
LeeH Senior Member Join Date: Dec 2005 Location: The conservative underground Posts: 341	3550 and TKO use the same case, The only oddball case was the early 3550 which did not have all the extra ribbing external for support. The early cases break next to the top mount ears, The newer case has the extra ribbing. You can convert a 3550 to a TKO which requires the TKO input(26 spline) and the mainshaft(31 spline). The tail housing changes to accomadate the larger O.D. of the 31 spline yoke, Or it can be machined to fit the 31 spline output yoke. The input and mainshaft size increase is what makes these transmissions different, The TR3550 is rated for 350Ft lbs Tq while the TKO is rated at 425. The Tremec part number for the TR3550 and TKO case is 2606106. Its the shaft size that changes the the Tq rating of these transmissions. I posted the address of the TR3550/TKO service manual which is located on TTCs website(TTC is Tremec). __________________ 89LX Hatch 89LX Coupe 89GT 90GT 93GT