escortinadriver
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Setting diff pinion tail shaft angle.
Have now fitted a mk1 cortina axle to the escort and need to set the correct angle before welding on the spring saddles.
What is the easiest way to do this at home? I dont have an angle finder? Is there something I can use like a small spirit level and a protrector or similar?
From my understanding, I need to set diff and gearbox at the same angle?
Otherwise, do I just do it by eye?????
Suggestions?
Thanks? Shaun
'If I'd asked what people had wanted, they'd have said faster horses....' Henry Ford
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stuart h
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Re:Setting diff pinion tail shaft angle.
2012/12/05 15:55:26
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i used my iphone with the carpenter app that has a digital level on it!
stu
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spigot
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Re:Setting diff pinion tail shaft angle.
2012/12/05 17:11:11
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I'm pretty sure binning sell a magnetic angle finder. The angles should be equal but opposite so they end up essentially parallel. I would also recommend an extra degree nose down on the diff so when under power it becomes aligned
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ulsterman
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Re:Setting diff pinion tail shaft angle.
2012/12/05 19:46:46
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Hi mate,
The diff should be set at 4 Degress up, the same as the Works cars. The engine should also be leaning back at 4 Degrees. Bunnings sell at Magnetic protractor for about 30 bucks which you can either set on the cam cover for the engine or on the casing of the diff to get it right.
Cheers
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escortinadriver
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Re:Setting diff pinion tail shaft angle.
2012/12/06 21:41:37
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Thanks for the suggestions guys. Magnetic protractor sounds good.
Shaun
'If I'd asked what people had wanted, they'd have said faster horses....' Henry Ford
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Escortpower
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Re:Setting diff pinion tail shaft angle.
2012/12/06 22:33:21
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Shaun, don't bother with the Bunnings magnetic protractor. I have got one and they are not very accurate (ie:crap). I would go for something like this https://www.machineryhouse.com.au/M977# And I think we all know it's better to give them money than Bunnings.  Craig. PS when you work out the best angle....let me know.
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ulsterman
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Re:Setting diff pinion tail shaft angle.
2012/12/07 06:48:27
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Shaun,
Dont experiment with angles. The car should be set to 4 Degrees up for the diff, tailshaft and 4 degrees sloping back for the engine as per the Works Escort manual. It has been tried and tested for over 40 years so no need to reinvent the wheel.
Thats a good item Craig suggested although I have used the Bunnings one for years doing the engines and setting up the 4 link.
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Knightime
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Re:Setting diff pinion tail shaft angle.
2012/12/07 17:34:28
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Ulsterman is right set the diff to 4deg. I did that with my Mk1 2litre in the late70,s and did not have any trouble, It is the correct works setting.
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escortinadriver
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Re:Setting diff pinion tail shaft angle.
2012/12/08 00:27:16
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Thanks guys. Looks like 4 degress it is.... Craig, that looks good. Problem is, H&F is worse than bunnings, there's no way I could go in and JUST get that....... scared I'll walk out with a new milling machine. Now, while I'm under there....to watts on not to watts......  Shaun.
'If I'd asked what people had wanted, they'd have said faster horses....' Henry Ford
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Ford_Escort
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Re:Setting diff pinion tail shaft angle.
2012/12/08 08:01:07
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ulsterman
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Re:Setting diff pinion tail shaft angle.
2012/12/08 08:02:53
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Knightime
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Re:Setting diff pinion tail shaft angle.
2012/12/08 08:41:31
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Watt,s racing or tarmac.
Panhard gravel rally
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Paul Dunstan
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Re:Setting diff pinion tail shaft angle.
2019/12/21 18:25:23
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Sorry to raise an old thread but looking at my RS the diff pinion angle is more like 1.6 deg up - not 4. I have modelled my engine conversion around the 4 deg as I have seen elsewhere. I realise I should allow for maybe 1 deg up for acceleration which means maybe 2.6 down on the gearbox end?
Anyone measured the stock Mk2 diff pinion angle?
Does lowered reverse eye leaf springs effect pinion angle?
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martymexico
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Re:Setting diff pinion tail shaft angle.
2019/12/21 22:10:42
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Reverse eye doesn't alter pinion angle as the rear hangers stay where they were , if lowering beyond that I expect the diff will go more nose down by a micro amount. I've always gone for about 4 deg nose down as written in the rally prep book
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Paul Dunstan
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Re:Setting diff pinion tail shaft angle.
2019/12/22 11:19:31
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But my diff pinion is 1.6 deg nose up (+1.6).
Google says the angle between tail shaft and both flanges needs to be the same but opposite - meaning the output flange and diff flange need to be on the same vertical parallel plane. Hence if you have 4 deg pinion down on the diff you need 4 deg up on the gearbox which is impossible.
My thinking was 4 deg down on the gearbox and ideally 4 deg up on the diff during acceleration. Due to the forces during acceleration the diff pinion is rotated up meaning you need less than 4 deg pinion up at rest - but surely the pinion won’t move through 8 deg (-4 to +4) when accelerating.
What am I missing?
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