Putting a Borg Warner T5 Behind a 2.9i

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Putting a Borg Warner T5 Behind a 2.9i

Postby MercuryCapri2.9i » Tue Apr 05, 2005 12:57 am

I' just wanted to pass along how I put a Borg Warner T5 5 speed behind a Cologne 2.9i engine. I'm in the States and thus some of the items may be a bit rare in the UK. For that matter I suspect there are far better options for transmissions in the UK without having to resort to what I did. Here the Mustang 4 cyl T5's are very common and very inexpensive ($50 US with a bit of looking)

Here's the parts list:

Stock '74-'78 Mustang II 2.8 pressure plate
Stock Mustang II 2.8 clutch disk
Stock Mustang II 2.8 throwout bearing
Stock Mustang II 2.8 backing plate from '74-'78 manual tranny
Custom Brass Pilot bearing made from Motormite #14659
Cross shaft seal, Napa part #63122, for pivot shaft in the ...
Mustang II 2.8 bell housing; bore to 4.912"
T-5 transmission from 1987-1993 Mustang 2.3 with the 3.97:1 first gear
Stock Capri 2.8 flywheel bolts
Starter from a 2.8/2.9/4.0 Ranger/Bronco/Explorer
Team Blitz T5 trans crossmember
1987+ Mustang Speedocable (I chose to get one with the cruise control sender)

I can provide a PDF drawing of the pilot bush to interested parties

When using a Mustang II bell with a T5 converion, the ID of the bell must be opened up to 4.912". The starter needs to be changed to a Mustang II starter with remote solenoid. When used with a Capri flywheel the starter must be spaced 3/8" forward for the starter pinion to diengage from the ring gear. The shifter will come up almost an inch closer to the dash so be prepared to do some clearance work in the shifter hole. A new transmission crossmember is required. You can make one or buy one from Team Blitz. The driveshaft will need to be reworked. If you use a 85-93 Mustang V8 T5 then the input shaft is way too short and a special pilot bush in the flywheel will be required. The 2.3 4 cylinder T5's appear input shaft will end flush with the bell and are thus too short also.

I have mounted my 4 cyl T5 to the modified Mustang II bell. I can positively state the 4 cyl T5 input shaft is too short to reach the end of the crankshaft. I'll be turning a brass pilot bushing to go in the ID of the flywheel just like I did on my T9 conversion.

FYI, the 4 cyl T5 input shaft is 7.41 inches long. An early 85-93 Mustang V8 T5 has an input length of 7.18. A 94 up T5 from either a Mustang V8 or a Mustang 3.8 V6 should have an input shaft length of 7.85. The later should be long enough to properly engage with the flywheel.

BTW, the cover for the Bendix mechanism on the starter interfered with the motor mount when I spaced the starter out. I had to trim about 1/4" off the lower back corner of the motor mount to clear that.

I also clearanced a rib (5 lb hammer) in the tunnel for the shifter rail casting. This allowed me to tuck the transmission appreciably further up in the car to get better driveline alignment.

Shifter to transmission tunnel seal.....

I've found my solution though I'm not sure how repeatable this will be for others.

A 1985-86 Nissan 300Z Turbo T5 shifter seal plate is an almost perfect fit. Drill 4 holes and put some screws in and call it done.

The 300Z shifter boot will also fit OK around a Mustang shifter rod and will snap into a a MK3 full length console. It gaps a little at the bottom but I'm pretty confident a little contact cement will cure that.

In the US the T5's only came in 83-84 280ZX and 85-86 300Z TURBOCHARGED cars. I just happened to walk by one (the only one I've ever seen in a junkyard) today in my local Pull-it-yourself yard.

The T5 used in the Z's was not world class. It also has unique spline patterns on both the input and the output.

Don Haulsee
1976 ASC Capri II R/S 2.9i with Borg Warner T5 5 speed
1974 Capri MK1 2.8 4 speed factory AC


Well done mate!

Postby aerosam » Tue Apr 05, 2005 7:42 am

Having read that you have obviously put a lot of work and research time into your car work.

It's great to know that there are guys like you across the pond keeping the US capri's alive too.

Keep up the good work!


Putting a T5 behind a 2.9i

Postby SUNRISEBLUESKIES » Wed Apr 05, 2006 7:23 pm

Were you able to use the original Capri flywheel bolts when installing the T5 transmission? I'm currently bolting-up a 1990 T5 out of a Mustang GT behind a 2.8 V6 from a 1974 Capri and found, like you did, that the input shaft was short. Other than that, we seem to be using the same parts (Mustang II bellhousing, etc.). I've had the flywheel machined and have installed the pilot bearing inside the flywheel to make-up for the shorter input shaft on the T5. The heads on the flywheel bolts are too large and now interfere with the pilot bearing in the flywheel. It's very expensive to have new bolts machined. Did you run into any problems with your flywheel bolts? Perhaps you approached the pilot bearing challenge differently - do you have additional info on how you did that? Any additional info would be greatly appreciated. Cheers, Todd


Use Allen Heads

Postby MercuryCapri2.9i » Thu Apr 06, 2006 2:40 am

You could use Allen head (socket hex head) bolts. They need to be 10mm x1.0 pitch. They aren't easy to find but I found them somewhere as I have four in my desk drawer.

I'll try to find out where they came from here in the States.

I presume you are in the States?



Re: Use Allen Heads

Postby SUNRISEBLUESKIES » Sun Apr 09, 2006 7:14 am

That sounds like a good alternative - if you remember where you purchased them, please let me know. Thanks Don!
p.s. Yes - California to be exact.

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Must agree

Postby STEVE SB » Sun Apr 09, 2006 7:53 am

plenty of thougt gone into that.

Its also nice to see you guys coming on to this site. as you can advise on parts which arn'e available in the UK



its posts like this...

Postby jimbo1593 » Sun Apr 09, 2006 8:25 am

...which make ya wish we had an FAQ section on the board...great work mate.


Allen Head Bolt Source

Postby MercuryCapri2.9i » Sun Apr 09, 2006 3:10 pm

Turns out I had a machine shop (460 Machine Co) I work with get the bolts.

Sandra at 460 says call Southern Fasteners at (804) 743-2840, (Joanne, Cindy, or Lisa can help).

Southern Fasteners are industrial bolt suppliers. You may have to buy the bolts in box quantities. If they won't sell to you let me know and I'll have Sandra at 460 order a box. We'll split the cost as I'm sure I'll need some more of them eventually.

BTW, I'm located in Virginia.

Don Haulsee


T5 Installation

Postby SUNRISEBLUESKIES » Mon Apr 10, 2006 5:00 pm

Sounds great Don! Thanks very much for the additional information - and the offer. I'll contact Southern Fasteners and see what they say. BTW - all of your detailed information has proven very helpful and is spot on with what we have found so far with our installation. We are hoping to get everything bolted up within the next week or two and things like the starter information you provided (the 3/8" spacing) will save quite a bit of head scratching.

Our project is quite a blending of global ingredients. We are in California, using a German Capri 2.8 V6, mating it with a T5 transmission out of a domestically grown Mustang GT and installing it in a British Jensen Healey that was exported and originally sold in Belgium, then later imported to the States. It's amazing how well, with minor mods, this is all coming together.

The transmission we are using (purchased used with 40k miles since rebuild) had a Hurst Competition Plus shifter which has a nice tight feel to it. We also just ordered an Extreme Adjustable Shifter Handle from Unlimited Performance Racing Products (www.uprproducts.com) as we wanted the flexibility that the Extreme shifter handle provides. I'm also anxious to check out the shifter seal you mention to see if that may work in this installation.

Thanks again for taking the time to share your experience and post your information - and enjoy that awesome Virginia springtime!

- Todd


Re: T5 Installation

Postby mikecapri2.8i » Fri Jun 23, 2006 1:08 am

Todd, how did you make out with your T5 setup. I have a 1984 UK Capri 2.8i that I want to swap a T5 into it. Any reccomendations on which T5 to use..due to different gear rations, pilot bearing size, and the 3 different lengths of input shaft?? Mike

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Re: Putting a Borg Warner T5 Behind a 2.9i

Postby Jumbug13 » Sat Mar 31, 2018 12:11 am

“I can provide a PDF drawing of the pilot bush to interested parties”

Hi Don Haulsee,
Any chance you might still have the PDF with dimensions for the spacer on this. Thanks

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Re: Putting a Borg Warner T5 Behind a 2.9i

Postby Peter-S » Sat Mar 31, 2018 8:17 am

Jumbug13 wrote:“I can provide a PDF drawing of the pilot bush to interested parties”

Hi Don Haulsee,
Any chance you might still have the PDF with dimensions for the spacer on this. Thanks

You have probably spotted that the original post was 13 years ago. Unfortunately the original poster is not a forum member these days so unlikely he will reply but maybe someone else can help
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Re: Use Allen Heads

Postby Vermilion » Wed Apr 04, 2018 6:50 am

MercuryCapri2.9i wrote:You could use Allen head (socket hex head) bolts. They need to be 10mm x1.0 pitch. They aren't easy to find but I found them somewhere as I have four in my desk drawer.

I'll try to find out where they came from here in the States.

I presume you are in the States?


Remember to use extra high tensile bolts in flywheel "12.9 strengthen" or use ARP flywheel bolts from burton power.

Don't use stock 2.9I flywheels IT IS WAY too heavy. Standard 2.8 flywheel weights about 9.5kg and 2.9 fly wheel is about 15mm thicker and
weights about 13kg... I am using billet flywheel that weights 6.4kg without starter wheel.