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Oct 11, 2010 12:01:42 GMT
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Does anybody know of a 5 Speed gearbox that i could fit to a 1725 engine in my Hillman Hunter? Its got the 4 speed, none over-drive box on atm  Thanks  |
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Too many projects, not enough time.
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PhoenixCapri
West Midlands
Posts: 2,683
Club RR Member Number: 91
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Rootes 1725 GearboxPhoenixCapri
@phoenixescort
Club Retro Rides Member 91
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Oct 11, 2010 13:01:06 GMT
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Bolt on wise all you have is an OD box to give you sort of 5 speed (just need the shorter prop) 5 speed wise, well guess you can get most RWD boxes to fit with time and effort, but the common choice would be the old Ford Type 9 as it has a plunge joint for the prop (like the hillman has as stock) and a separate bell housing. You'd need a home made bellhousing and a modded prop for that. Thats the easiest option, though many would say not the best. Do you know what final drive ratio the diff is? If you just want longer gearing for cruising the easiest way would be to go to a longer gear set. Though the 4 speed non OD tend to have the longest (3.7:1?) there were a few avalible for the Hillman axles and I've heard of Ford diff gear sets being bolted inside the Hillman axle casing without too much hassle. Hope that helps a bit |
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craig
Posted a lot
Posts: 1,029
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Oct 11, 2010 14:26:22 GMT
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Did a similar job on my Viva. There were no after market kits so made a bell housing up myself. If you've got access to a lathe your laughing but if not be prepared to pay some serious money for an engineering place to do it. It's all on the link in my sig from about page 4.
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Oct 11, 2010 19:33:26 GMT
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and I've heard of Ford diff gear sets being bolted inside the Hillman axle casing without too much hassle. Hope that helps a bit That's interesting.... you wouldn't happen to have any leads on this I could follow up? |
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'71 Arrocuda.... '71 Sunbeam Rapier Turbo (The Grim Rapier).... '63 Hymek D7076..... Audi GT5S
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v8ian
Posted a lot
Posts: 3,763
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Oct 11, 2010 20:56:31 GMT
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Ive been thinking about the Linage of the Rootes products, The only RWD Rootes car I can think of with a 5 speed is the Lotus Talbot, which with its DogLeg Getrag 5 speed which is bolted onto the back of what basically a Lotus,[Vauxhall??] engine, so thats a not runner, Was the Ti fitted with a 5 speed? as that is a upgraded 1500 out to 1600,
There are a lot of ford to rootes interfaces, wheels, hydraulics, clutches, and probably a lot more,
You may find Skip Brown makes a bellhousing to fit a ford box to a rootes engine, its got to be worth a google,
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Atmo V8 Power . No slicks , No gas + No bits missing . Doing it in style.
Austin A35van, very different------- but still doing it in style, going to be a funmoble
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PhoenixCapri
West Midlands
Posts: 2,683
Club RR Member Number: 91
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Rootes 1725 GearboxPhoenixCapri
@phoenixescort
Club Retro Rides Member 91
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That's interesting.... you wouldn't happen to have any leads on this I could follow up? Well its an odd story actually. One of my best mates dad's grew up in Iran where his uncle was the main Iranian importer for Triumphs, and was also very much into rallying. This was before things got messy out there, obviously. And what RWD saloon was made in Iran, well basically the Hunter, which has basically the same axle as the older minx's. Apparently they wanted high ratios for the rally cars (4.1, 4.4 etc) and so made the CROWN wheel and pinion from Transit axles fit - I would guess these were Atlas axles. The Atlas was being used at the time on the 3ltr capri's, and if my rallying knowledge serves me right, also on the RS1800's Guess its the bolt hole spacing on the CROWN wheel that's most important, so just need to get a hillman diff and a ford CROWN wheel and try it out. I might give it a go when I get back in the winter, since I have both sat around in the barn. |
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The Jensen-Healey used more or less the the same engine as the Sunbeam Lotus and mated it to a Hunter gearbox. So in theory it should be possible to mate the Hunter engine to the Sunbeam Lotus gearbox! I'm sure it's not as easy as all that though. ;D Ive been thinking about the Linage of the Rootes products, The only RWD Rootes car I can think of with a 5 speed is the Lotus Talbot, which with its DogLeg Getrag 5 speed which is bolted onto the back of what basically a Lotus,[Vauxhall??] engine, so thats a not runner, Was the Ti fitted with a 5 speed? as that is a upgraded 1500 out to 1600, There are a lot of ford to rootes interfaces, wheels, hydraulics, clutches, and probably a lot more, You may find Skip Brown makes a bellhousing to fit a ford box to a rootes engine, its got to be worth a google, |
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63 Alpine Series III
69 Imp Sport 930
07 Golf V GTI
11 Freelander 2 (hers!)
70 Hunter Royal (scrapped), 78 Chrysler Alpine GLS (given away), 84 505 STi (sold), 01 206 1.6XR (sold)
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kenb
Part of things
Posts: 604
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Oct 12, 2010 12:47:03 GMT
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Personally I would get my self the type 9 and be looking at getting the original Hillman bellhousing either modified (in a machine shop) or use an ali spacer if there's room between b/housing and box to take care of any hole position differences. The spacer idea may work better if you find the V6 type nine which has longer the input shaft and better ratios.
The clutch is the easy bit, as I'm sure one of the Avenger drive plates has 23 splines on a 1" dia.
They all pretty much fit anyway, as I'm using a FWD AP Fiesta plate in a pinto cover!!
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Oct 12, 2010 13:13:21 GMT
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Not many UK Transits had an Atlas under them, i don't know about the ones built for tougher climes, most of the SWB vans had a variant of the Colne axle from memory, having said that the P100 has an Atlas diff but with much thicker tubes and shafts so maybe transits were built the same way?
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Volvo back as my main squeeze, more boost and some interior goodies on the way.
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PhoenixCapri
West Midlands
Posts: 2,683
Club RR Member Number: 91
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Rootes 1725 GearboxPhoenixCapri
@phoenixescort
Club Retro Rides Member 91
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Oct 12, 2010 14:21:12 GMT
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I'm talking late 60's early 70's here so MK1/2 Transit - thought they were mainly Atlas?
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Oct 12, 2010 14:50:47 GMT
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I'm going from memory and i can't speak for all vans, but i think this came up before on another forum when people were looking for higher geared diffs for van axles so the 24v didn't top out at 120mph, mine hasn't got an Atlas in it though.   |
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Volvo back as my main squeeze, more boost and some interior goodies on the way.
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Oct 12, 2010 22:02:56 GMT
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Just done a little google research and it appears that there were 2 types of 'Atlas' fitted to Ford vehicles. The one fitted to the Capri is sometimes referred to as the 'baby atlas' which suggests (as you would expect) that the car one was of a similar design only smaller. Whether this is the casing and the half shafts that are smaller but the CROWN wheel is the same size I can't find out. Even if it was it would probably be a smaller ratio for a tranny which defeats the object.
Standard manual box Hunter one is 4.22 I think.
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'71 Arrocuda.... '71 Sunbeam Rapier Turbo (The Grim Rapier).... '63 Hymek D7076..... Audi GT5S
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Speak to Madmods off of here, I sold him a Rootes 4+OD box a while back. Never know, he might not have sold it
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bazzateer
Posted a lot
Imping along sans Vogue
Posts: 3,653
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Sept 14, 2015 12:07:51 GMT
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Resurrecting an old thread here but a friend has successfully mated a 6 speed Lexus box to the Rootes 1725 in several Commer campervans and at least one Arrows shape Rapier.
He's on the Commervanfan forum as Commeracer.
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1968 Singer Chamois Sport
1972 Sunbeam Imp Sport
1976 Datsun 260Z 2+2
1998 Peugeot Boxer Pilote motorhome
2003 Rover 75 1.8 Club SE (daily)
2006 MG ZT 190+ (another daily)
2007 BMW 530d Touring M Sport (tow car)
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