T5 fitting

[Paul bow]

Hi guys, reading some old posts it would seem the T5 from elite is a tight fitment at the front, some have mentioned fouling in the rear gearbox x member.
I have a monocoque metal works internal subframe fitted in mine and any compromise here is going to be a problem (see pics), the steel box section runs across the entire width of the car (same at the rear bulkhead) connecting to the same box section running within the sills, making a H frame.

Has anyone recently fitted one of these, a lot of the posts are over 10 years old and it seems issues with the noisey 5th gear have now been addressed.(?)

Any advice on fitting and what may need trimming/fabricating etc would be greatfully received, just about to buy one with the 0.73 5th to go with the 3.07 diff.

[mgcjag]

Hi Paul.....do you use JagLovers forum....lots of info there on T5...it may help?.....Steve

[Quattrofrank]

Hi
I have the same hidden subframe kit in my car and I belive everything is hidden under the existing metal so that I wouldnt affect any clearance.
At least I hope so since I have it, and will be mounting a 5 speed to my car as well

[bitsobrits]

"just about to buy one with the 0.73 5th to go with the 3.07 diff"

I have the .73 5th with a 3.54 diff (so 2.58 overall in 5th) and it's more than adequate for relaxed cruising, but on the edge of marginal for high gradients without downshifting, and with an unnaturally large gap from 5th down to 4th. I would think the .80 option would be the ideal choice for a 3.07 diff (2.46 overall), and would also provide a nice close ratio aspect to the gear changes.

[Paul bow]

Thank you guys much appreciated..
Bitsobrits..that’s very helpful with the ratios I wasn’t sure whether the 0.8 or the 0.73 would be best suited to the 3.07 diff, so getting that feedback is very useful, no good selecting fifth and it feeling like it’s dropped off a cliff …many thanks

[Simonpfhc]

Hi Paul,

I have a T5 in mine. Superb gearbox and 5th gear is quiet. I didn’t make any modifications to any metal on the car itself, all I did was to relieve certain areas on the gearbox. I have pictures that I can send to you if you would like. From what I know of the MM subframe, it merely sits within the factory crossmember. So as Quattrofrank said, shouldn’t have any impact.

With respect to the 5th gear ratio, I used an equation that I got from someone who knew Etypes pretty well (can’t quite remember who now!)

“I have found that the 3.8 and 4.2 Jag engines like a combined OD and final drive to work out around 2.5.
example: 3.54 x .73OD = 2.5842
3.07 x .83OD = 2.5481
4.09 x .63OD = 2.5767 ( used in XK 150 type kits)”

I have a 3.31 final drive (ex US) so went with a 0.8 5th ratio.

So my 3.31 x 0.8 = 2.648, is near perfect!
3.31 x 0.63 = 2.085 way too high!

Hope this helps.

[mgcjag]

Try this gear ratio checker https://wahiduddin.net/calc/calc_speed_rpm.htm

[Paul bow]

Thank you steve ..
Simon any pics would be a great help, pictures often speak a thousand words!
Many thanks