Amazon axle ratio, (Diesel conversion)

pxr5 · Sep 14th, 2010, 15:27

Any one out there running an Amazon with a diesel engine?
I'm just about finished swapping in a 306 turbo diesel engine into a four door Amazon. ( using a 5 speed rear wheel drive box)
I think the stock diff' will be about 4:50, so the question is what axle can I use that fits in with out to much bother & that gives me a better ratio?
I reckon more like 3:5 would be more suitable?
thanks

222s · Sep 14th, 2010, 15:45

Can't comment on the best diff ratio for your appllication (do you have the gearing / rev band data for your engine & gearbox?), however the highest diff that I know of for an Amazon is 4.1:1, which is the regular saloon diff. All estates and any saloon with a factory fitted overdrive had the 4.56:1 diff.

Btw, what gearbox are you using - Sherpa?

pxr5 · Sep 14th, 2010, 16:48

The box is a merc jobbie,( from some unknown small van, which was fitted with the peugoet diesel) I assume it is a 1to 1 fourth & over drive top.
The engine has a 5k red line, but these have a low rpm power band, so the diff needs to be at least 4;1 ( the car is a factory OD gearbox model)

222s · Sep 14th, 2010, 17:03

Didn't realise that Merc also used them in rwd. Some of the smaller Sherpas used the Pug 1.9td with the Rover / BL LT77 gearbox.

Depending on the gearbox ratios, it may be easier to attach the diesel to the M41, as well as using a non o/d saloon axle. This has been done before in Holland, but with a VW 1.9td:

http://www.volvoforums.org.uk/showpo...0&postcount=17

pxr5 · Sep 14th, 2010, 19:08

That's interesting to read the dutch guy's diesel conversion, & also the Sherpa/LT77 box.

I'll run it as is,hopefully the box is right, it looks in very good order- then take it from there.
Ps, any one have a 4.1:1 diff?

thanks for your help!

davidw6092 · Sep 14th, 2010, 20:56

Hi,I would love to have a look at your conversion some time.I live and work in banbury and was going to do a similar conversion for a customer.phone or text 07941 342185 cheers Dave

B20F · Sep 15th, 2010, 08:27

The dif from BW35 autoboxes have a 3.91:1 ratio. If you can get one from a 1800E or ES you will also have the benefit of rear disc brakes. The bolt patern for the wheels is different from the ama though. 5x108mm for the disc brake axle instead of 5x114,3mm for the ama drumbrake axle.

tdz840 · Sep 15th, 2010, 10:37

You can also source a new crown wheel and pinion to replace your existing. Several ratios available from as low as 3.4:1 up to 5.01:1.
With new bearings expect to shell out in the region of £500
Russ

222s · Sep 15th, 2010, 11:09

Quote:

Originally Posted by B20F

The dif from BW35 autoboxes have a 3.91:1 ratio.

Is that all '60s Volvos with auto boxes or just the 1800 and / or 1800E/ES? I was always under the impression that the auto Amazons used the same diff as the regular M40 manual box, as the top gear ratios were both 1:1.

Derek UK · Sep 15th, 2010, 11:23

3.91 only in late autos with disc brake rears. BW35 with 4.1 on Amazon saloons and 4.56 on estates (LHD markets)
A Dutch friend has just fitted an AW70 to his auto combi. This has 3 speeds + OD and effectively gives him a 4.1 as would an M41. This would be a nice conversion on a saloon with a 4.1 axle.

Sep 14th, 2010, 15:27	#1
pxr5 Junior Member Last Online: Jun 24th, 2017 17:58 Join Date: May 2010 Location: Banbury	Amazon axle ratio, (Diesel conversion) Any one out there running an Amazon with a diesel engine? I'm just about finished swapping in a 306 turbo diesel engine into a four door Amazon. ( using a 5 speed rear wheel drive box) I think the stock diff' will be about 4:50, so the question is what axle can I use that fits in with out to much bother & that gives me a better ratio? I reckon more like 3:5 would be more suitable? thanks

Sep 14th, 2010, 15:45	#2
222s Amazoniste Last Online: Sep 19th, 2016 21:52 Join Date: Nov 2002 Location: Emsworth View Photos By: 222s	Can't comment on the best diff ratio for your appllication (do you have the gearing / rev band data for your engine & gearbox?), however the highest diff that I know of for an Amazon is 4.1:1, which is the regular saloon diff. All estates and any saloon with a factory fitted overdrive had the 4.56:1 diff. Btw, what gearbox are you using - Sherpa? __________________ Paul - 1967 Amazon 222S B20 o/d Estate & 1961 A-H Sprite Mk2 948cc WANTED - For '67 Amazon estate - offside rear quarter, preferably new old stock.

Sep 14th, 2010, 17:03	#4
222s Amazoniste Last Online: Sep 19th, 2016 21:52 Join Date: Nov 2002 Location: Emsworth View Photos By: 222s	Didn't realise that Merc also used them in rwd. Some of the smaller Sherpas used the Pug 1.9td with the Rover / BL LT77 gearbox. Depending on the gearbox ratios, it may be easier to attach the diesel to the M41, as well as using a non o/d saloon axle. This has been done before in Holland, but with a VW 1.9td: http://www.volvoforums.org.uk/showpo...0&postcount=17 __________________ Paul - 1967 Amazon 222S B20 o/d Estate & 1961 A-H Sprite Mk2 948cc WANTED - For '67 Amazon estate - offside rear quarter, preferably new old stock.

Sep 14th, 2010, 20:56	#6
davidw6092 Senior Member Last Online: Oct 4th, 2023 06:43 Join Date: Dec 2008 Location: Banbury	diesel conversion Hi,I would love to have a look at your conversion some time.I live and work in banbury and was going to do a similar conversion for a customer.phone or text 07941 342185 cheers Dave

Sep 15th, 2010, 08:27	#7
B20F Master Member Last Online: Jul 7th, 2016 21:43 Join Date: Mar 2007 Location: Zeist View Photos By: B20F	The dif from BW35 autoboxes have a 3.91:1 ratio. If you can get one from a 1800E or ES you will also have the benefit of rear disc brakes. The bolt patern for the wheels is different from the ama though. 5x108mm for the disc brake axle instead of 5x114,3mm for the ama drumbrake axle. __________________

Sep 14th, 2010, 16:48	#3
pxr5 Junior Member Last Online: Jun 24th, 2017 17:58 Join Date: May 2010 Location: Banbury	The box is a merc jobbie,( from some unknown small van, which was fitted with the peugoet diesel) I assume it is a 1to 1 fourth & over drive top. The engine has a 5k red line, but these have a low rpm power band, so the diff needs to be at least 4;1 ( the car is a factory OD gearbox model)

Sep 14th, 2010, 19:08	#5
pxr5 Junior Member Last Online: Jun 24th, 2017 17:58 Join Date: May 2010 Location: Banbury	That's interesting to read the dutch guy's diesel conversion, & also the Sherpa/LT77 box. I'll run it as is,hopefully the box is right, it looks in very good order- then take it from there. Ps, any one have a 4.1:1 diff? thanks for your help!

Sep 15th, 2010, 10:37	#8
tdz840 VOC Member Last Online: Dec 14th, 2023 11:57 Join Date: Nov 2004 Location: fareham	You can also source a new crown wheel and pinion to replace your existing. Several ratios available from as low as 3.4:1 up to 5.01:1. With new bearings expect to shell out in the region of £500 Russ

Sep 15th, 2010, 11:23	#10
Derek UK VOC Member Last Online: Yesterday 20:59 Join Date: Jul 2006 Location: Chatham	3.91 only in late autos with disc brake rears. BW35 with 4.1 on Amazon saloons and 4.56 on estates (LHD markets) A Dutch friend has just fitted an AW70 to his auto combi. This has 3 speeds + OD and effectively gives him a 4.1 as would an M41. This would be a nice conversion on a saloon with a 4.1 axle.

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