Lt77 gearbox in a Dolomite

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SprintV8
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Joined: Wed Oct 04, 2006 9:49 pm
Location: Sutton,Surrey.

#16 Post by SprintV8 »

http://www.roversd1.nl/sd1web/lt77.html
2011 Mini Clubman John Cooper Works. S Daily Driver.
1980 Dolomite Sprint with a touch of BLTS
Balanced Lightened and Tweaked 13B Rotary and SsuperCharged.
Back in my possession 22 September 2019.
Rebuilding the Sprint time taken so far, 111Hrs@15/12/2020
212Hrs @31/12/2021
352 @ 28/11/2022
455Hrs @ 20/10/2023
565Hrs @ 07/12/2024
This is time taken at the Sprint not necessary time worked.

Member TDC no 0471

Project 13B Sprint now back on..
No Pistons No Cams how’s it gonna Run Brap Brap?
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xvivalve
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Joined: Thu Sep 28, 2006 1:13 pm
Location: Over here...can't you see me?

#17 Post by xvivalve »

LT77 should fit in a late 1850 easier than a Sprint as the splines on the input shaft are the same as a TR7 as is the clutch plate, therefore less to change.

Why though? We've been through pro's & cons of to do or not to do this swap before.
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DavePoth
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#18 Post by DavePoth »

I suppose if you have an LT77 in your garage, it's a much more attractive proposition that a sprint O/D box you don't have...
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2F45T4U

#19 Post by 2F45T4U »

Are you trying to get me back from being catty with Jonners?


Yer why... as theres lots of bolts holding engines to gear boxes, I'd have to split the tr7 one from the lt77, then the dolly 7 from the 4 speed, then put the tr7 back on the 4 speed... That is the only reason :lol:
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2F45T4U

#20 Post by 2F45T4U »

Will the prop mate with the out put flange, same bolt pattern???
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Jon Tilson
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Catty?

#21 Post by Jon Tilson »

Catty Adam? Surely not...just your normal humorous banter...

Like I often say, while we may rib you and therefiore get some back, we never forget that guys like you are the future....

So go for it if you want to....we'll all watch and have a laugh...

So who hanst got a spare Sprint box then? Cheaper and better if you ask me...

the prop flange is the same....cant say much about the length though.

Jonners
Note from Admin: sadly Jon passed away in February 2018 but his humour and wealth of knowledge will be fondly remembered by all. RIP Jonners.
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slant4

why

#22 Post by slant4 »

4 sp o/d is far more fun - was good enough for the stag and tr5/6

So you welded up that tr7 yet?

You know a guy called Gareth in Doncaster? Think you maybe bro's
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2F45T4U

#23 Post by 2F45T4U »

Yes just humourous banter

Yer I have an LT77 box and not an OD box.


Thing is I don't know what mood I'll be in on the day, may try it may not :P
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SprintV8
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Joined: Wed Oct 04, 2006 9:49 pm
Location: Sutton,Surrey.

#24 Post by SprintV8 »

4.2/4.5 T5 Cerbera
1st 2.95:1
2nd 1.95:1
3rd 1.34:1
4th 1.00:1
5th 0.80:1
Mine should pull more MPH in the first 3 gears then if I can get TRACTION.
And with two gear ratio's option's.

Wide ratio kit gearing:
1st: 2.915:1
2nd: 1.932:1
3rd: 1.323:1
4th: 1:1
5th: 0.8:1

Close ratio kit gearing:
1st: 2.527:1
2nd: 1.675:1
3rd: 1.259:1
4th: 1:1
5th: 0.87:1



LT77 SD1
1st 3.321:1
2nd 2.087:1
3rd 1.396:1
4th 1.00:1
5th 0.792:1
2011 Mini Clubman John Cooper Works. S Daily Driver.
1980 Dolomite Sprint with a touch of BLTS
Balanced Lightened and Tweaked 13B Rotary and SsuperCharged.
Back in my possession 22 September 2019.
Rebuilding the Sprint time taken so far, 111Hrs@15/12/2020
212Hrs @31/12/2021
352 @ 28/11/2022
455Hrs @ 20/10/2023
565Hrs @ 07/12/2024
This is time taken at the Sprint not necessary time worked.

Member TDC no 0471

Project 13B Sprint now back on..
No Pistons No Cams how’s it gonna Run Brap Brap?
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