Diff info
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I have a mk1 estate. '68. It has A type O/D which works now. However, top end is very strained. The diff is probably 4.1:1. Is this not helping. Is it easy to swap to a better ratio and what is all round best. Would a 3.7 make it more relaxed top end and if so, would this have to come from an auto. If so would it fit ok. How would I find one (that works) if this is needed. Jeff
White Triumph 2000 estate mk1 1968
Triumph 2.5PI Valencia
Triumph 2.5PI Valencia
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Re: Diff info
Hello Jeff,
Sorry I can't give you an answer.
But I'm surprised. I have exactly the same configuration on my 2000 (1966) and I use it on the highway as a modern one without difficulty.
GPS cruising speed at 120-130km/h (75-80 mph). Top speed (without exploding the engine...) probably around 90 mph.
Do you want/need more? What's your actual top speed maybe the ratio is not the problem?
Fabien.
Sorry I can't give you an answer.
But I'm surprised. I have exactly the same configuration on my 2000 (1966) and I use it on the highway as a modern one without difficulty.
GPS cruising speed at 120-130km/h (75-80 mph). Top speed (without exploding the engine...) probably around 90 mph.
Do you want/need more? What's your actual top speed maybe the ratio is not the problem?
Fabien.
Land Rover 88 SIIA
TR3 Puzzle... to be rebuilt
2000 MK1
TR3 Puzzle... to be rebuilt
2000 MK1
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Re: Diff info
Land Rover 88 SIIA
TR3 Puzzle... to be rebuilt
2000 MK1
TR3 Puzzle... to be rebuilt
2000 MK1
Re: Diff info
Your car should have been fitted with a 4.1:1 diff from the factory. The serial number should start MB. This should give a reasonable pick up from the line, and a good cruising speed. I have not seen it really necessary to change to a 3.7:1 although the post 1975 cars had these. These 3.7 diffs are colour coded yellow on the inside of the flanges. A 3.45:1 (colour coded red) as fitted to the 2.5 cars is too far!
Charles Harrison
Register member 3095
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Cherry Red Mk1 2000 Rally Car
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Register member 3095
Folkestone
Cherry Red Mk1 2000 Rally Car
Mallard Blue 2.5PI
Sapphire Blue GT6 Mk3
Vermillion Red Spitfire 1500
Pimento Red TR6
Inky Blue VW Passat B5.5
Arctic Blue Jaguar XJ40
Silver Range Rover Vogue SE
Re: Diff info
Why do you say too far? I was considering swapping the diff in my 2000 to a 3:34. Is this not a good idea?
Re: Diff info
It will have great low revs at speed, but will be very slow off the mark, and need to drop a gear on the smallest of hills!
Charles Harrison
Register member 3095
Folkestone
Cherry Red Mk1 2000 Rally Car
Mallard Blue 2.5PI
Sapphire Blue GT6 Mk3
Vermillion Red Spitfire 1500
Pimento Red TR6
Inky Blue VW Passat B5.5
Arctic Blue Jaguar XJ40
Silver Range Rover Vogue SE
Register member 3095
Folkestone
Cherry Red Mk1 2000 Rally Car
Mallard Blue 2.5PI
Sapphire Blue GT6 Mk3
Vermillion Red Spitfire 1500
Pimento Red TR6
Inky Blue VW Passat B5.5
Arctic Blue Jaguar XJ40
Silver Range Rover Vogue SE
- TedTaylor
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Re: Diff info
I'm very much with Charles on this.Charles H wrote:It will have great low revs at speed, but will be very slow off the mark, and need to drop a gear on the smallest of hills!
MUT
Member 4473 1990
1964 2000 period rally look alike AFH 849B
Morris 1800 London-Sydney/Monte/WCR NAM 616G
Mk1 PI Estate SCG 115G
2500 Estate WDE 76K RBRR 2014
1964 2000 period rally look alike AFH 849B
Morris 1800 London-Sydney/Monte/WCR NAM 616G
Mk1 PI Estate SCG 115G
2500 Estate WDE 76K RBRR 2014
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Re: Diff info
I have had a look at the wheels and they are 195 55 r15 as they are on minilytes. Using a speedo check calculator this should bring a difference of 3 miles/hour below, which means to get to 70 I need work a bit more as on dial at 70 the car is doing 67. Ideally 205 55 r13 would have been far better match. 70 dial, 70 in real world.
I have had carbs balanced, has had a new coil and plugs, distributor and electronic ignition, compression is OK and I have played with timing but will have a go at this again.
I have had carbs balanced, has had a new coil and plugs, distributor and electronic ignition, compression is OK and I have played with timing but will have a go at this again.
White Triumph 2000 estate mk1 1968
Triumph 2.5PI Valencia
Triumph 2.5PI Valencia
- Alan Chatterton
- Senior Member
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Diff info
3.34 will be too low geared. Won't pull away, well, very slow. Unless you have serious torque to overcome it. I.e. V8 torque! I need to change my 3.45 for a 3.7 as the bottom end punch is a bit lacking. Any one got a good 3.7 Stag diff they want to part with?
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Sent from my iPhone using Tapatalk
Alan Chatterton
Location; Redditch
DEL 33 1972 Lines Stag Estate Tartan Red
Blog http://vml3m.blogspot.com/
Location; Redditch
DEL 33 1972 Lines Stag Estate Tartan Red
Blog http://vml3m.blogspot.com/
- Andy Thompson
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Re: Diff info
Alan, I always thought those big tyres on 15 inch rims plus 3.45 diff was a bit optimistic for a manual stag - they love to REV - triumph weren't daft fitttinga 3.7 to the manual - maybe the auto could have coped with a 3.45 although it really needed a 4 speed auto!
Perth WA
1970 2500PI estate
1964 2.7PI saloon
1973 2100 EFI Megasquirt
1972 Stag
http://triumphwestoz.blogspot.com/
Very Big garage
1970 2500PI estate
1964 2.7PI saloon
1973 2100 EFI Megasquirt
1972 Stag
http://triumphwestoz.blogspot.com/
Very Big garage
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