T5 gearbox upgrades or replacement.
Discussion
As im putting more and even more nitrous oxide through my poor 450 Chimaera im wondering what bits going to break first.
Are there any recommendations for the T5 box. I know the 5th gear can be weak but im still in 4th at the drag strip. How strong are the first 4 gears?
I need things to stay in 1 piece at well over 400 lb/ft of torque.
Is it possible to strangthen the T5 or would a new box be required?
I will also be replacing the driveshafts with th 'Raceproved' items.
Are there any other weak points in the drive train i need to look into?
Are there any recommendations for the T5 box. I know the 5th gear can be weak but im still in 4th at the drag strip. How strong are the first 4 gears?
I need things to stay in 1 piece at well over 400 lb/ft of torque.
Is it possible to strangthen the T5 or would a new box be required?
I will also be replacing the driveshafts with th 'Raceproved' items.
Are there any other weak points in the drive train i need to look into?
shpub said:
Competition Transmission Services... Internal upgrade...
That'd be this then :-http://www.gearboxman.co.uk/infot5.html
From a financial point of view would it be any more expensive to wait for such an upgrade until after something had broke
?rev-erend said:
There is a gear calculator on the CTS site..
Derek was referring to the model I have of his car in some software (Cartest 2000) and differences to a 1/4 mile time 
It seemed that such a tall first gear would require serious clutch abuse in first, especially with Micky Thompson drag radials!
I don't know how much the Gearboxman upgrade is but with the Pound improving against the Dollar maybe you should have a look at:
http://www.gforcetransmissions.com/tran_gt-5.asp
This may also help:
http://www.fordmuscle.com/archives/2005/12/T5Rebui...
http://www.gforcetransmissions.com/tran_gt-5.asp
This may also help:
http://www.fordmuscle.com/archives/2005/12/T5Rebui...
The conversion this side of the pond is £895.
Ive emailed the states to see how they compare.
Interesting the ratios are basically the same in the first 4 gears but have a long overdrive of 0.59:1.
I know i would never use 5th on a drag strip or race track so i think this would be beneficial to motorway cruising and a theoretical top speed of over 200 mph.
Maybe they could do a 0.75:1 or thereabouts would be better.
Ive emailed the states to see how they compare.
Interesting the ratios are basically the same in the first 4 gears but have a long overdrive of 0.59:1.
I know i would never use 5th on a drag strip or race track so i think this would be beneficial to motorway cruising and a theoretical top speed of over 200 mph.
Maybe they could do a 0.75:1 or thereabouts would be better.
We've been looking at a conversion using the elite 6 speed sequential gearbox. so far we've had it mated to a john eales modified t5 bellhousing in a chimaera chassis behind the rv8... it all seems to go in fairly well. with some minor work to get the shifter in the right place..
We're using the rlite box in our Sagaris racer and Tim hood is now running one in his LS3 sagaris racer as well..
If your interested in talking about fitting one drop me a line.. the box can be built with either straight cut or helical gears to keep the noise down in a road car, although currently still dog engagement rather than synchro.
The nice bit about the elite is the drop gears, so you can quickly speed up or slow the box down.
Cheers
Graham
We're using the rlite box in our Sagaris racer and Tim hood is now running one in his LS3 sagaris racer as well..
If your interested in talking about fitting one drop me a line.. the box can be built with either straight cut or helical gears to keep the noise down in a road car, although currently still dog engagement rather than synchro.
The nice bit about the elite is the drop gears, so you can quickly speed up or slow the box down.
Cheers
Graham
Graham said:
We've been looking at a conversion using the elite 6 speed sequential gearbox. so far we've had it mated to a john eales modified t5 bellhousing in a chimaera chassis behind the rv8... it all seems to go in fairly well. with some minor work to get the shifter in the right place..
We're using the rlite box in our Sagaris racer and Tim hood is now running one in his LS3 sagaris racer as well..
If your interested in talking about fitting one drop me a line.. the box can be built with either straight cut or helical gears to keep the noise down in a road car, although currently still dog engagement rather than synchro.
The nice bit about the elite is the drop gears, so you can quickly speed up or slow the box down.
Cheers
Graham
Now this sounds really interesting but also very expensive.We're using the rlite box in our Sagaris racer and Tim hood is now running one in his LS3 sagaris racer as well..
If your interested in talking about fitting one drop me a line.. the box can be built with either straight cut or helical gears to keep the noise down in a road car, although currently still dog engagement rather than synchro.
The nice bit about the elite is the drop gears, so you can quickly speed up or slow the box down.
Cheers
Graham
Can you give me a ballpark figure for parts?
How did you get on with a T5 upgrade Derek?
I am at the point with my Box out as 2nd and 5th are going in the Cerb so i will beef it up as i will be getting a re-map very soon after a few upgrades so will be a good bit over the box's power rating.
I have looked at both the uk kit and the one on over the pond just looking for feed back.
Cheers Scotty
I am at the point with my Box out as 2nd and 5th are going in the Cerb so i will beef it up as i will be getting a re-map very soon after a few upgrades so will be a good bit over the box's power rating.
I have looked at both the uk kit and the one on over the pond just looking for feed back.
Cheers Scotty
I bought a brand new CR T5 from CTS - with all the upgrades available. It was subsequently upgraded due to necessity after less than 10 hours race use (behind a V6 producing less power and torque than your V8 Derek 
). Readman Racing did the work for me and there were some easy upgrades that strengthed the box. They also fitted a hurst quickshift at the time. Must say a much nicer after upgrade.
). Readman Racing did the work for me and there were some easy upgrades that strengthed the box. They also fitted a hurst quickshift at the time. Must say a much nicer after upgrade.Yeah i had mine rebuilt with some upgrades by John at Readmans also.
There was a small mix up. John replaced the tail with a direct gearstick option rather than the remote type linkage we all have. I didnt realize i would need to make up a new gearbox mounting and to modify the gearstick itself to sit back in its original position. I didnt have the time or materials so took the box straight back and John replaced the original tail. I had the box back in and the car was on the way to the drag strip the next day.
Johns a straight up guy and agreed a price before hand. When he stripped my box he found my gearset was on its last legs (cant think why
). Another customer had brought a Sag box in for a close ratio gearset so he fitted the old set from that to mine at no extra cost. Apparently the Sag only had 8k on it.
The box works as new now. Only problem is a very slight leak at the original tail seal on the prop.
There was a small mix up. John replaced the tail with a direct gearstick option rather than the remote type linkage we all have. I didnt realize i would need to make up a new gearbox mounting and to modify the gearstick itself to sit back in its original position. I didnt have the time or materials so took the box straight back and John replaced the original tail. I had the box back in and the car was on the way to the drag strip the next day.
Johns a straight up guy and agreed a price before hand. When he stripped my box he found my gearset was on its last legs (cant think why
). Another customer had brought a Sag box in for a close ratio gearset so he fitted the old set from that to mine at no extra cost. Apparently the Sag only had 8k on it. The box works as new now. Only problem is a very slight leak at the original tail seal on the prop.
http://www.gearboxman.co.uk/infot5.html
is this the kit you guy went with?
What power will this handle does any on know?
is this the kit you guy went with?
What power will this handle does any on know?
scotty_d said:
http://www.gearboxman.co.uk/infot5.html
is this the kit you guy went with?
What power will this handle does any on know?
No. Just had a rebuild at Readman's. Much cheaper.is this the kit you guy went with?
What power will this handle does any on know?
Steve Heath has run a LOT of power through a T5 in his wedge racer IIRC.
They can handle more power and torque than you may expect. Ive had over 500lb/ft through mine plenty of times
dbv8 said:
No. Just had a rebuild at Readman's. Much cheaper.
Steve Heath has run a LOT of power through a T5 in his wedge racer IIRC.
They can handle more power and torque than you may expect. Ive had over 500lb/ft through mine plenty of times
Do you have a contact? Is he local to you as I will have to post mine no doubt.Steve Heath has run a LOT of power through a T5 in his wedge racer IIRC.
They can handle more power and torque than you may expect. Ive had over 500lb/ft through mine plenty of times
Gassing Station | General TVR Stuff & Gossip | Top of Page | What's New | My Stuff