Lancia Beta Forum
July 02, 2022, 05:27:19 AM *
Welcome, Guest. Please login or register.

Login with username, password and session length
News: Beta Meeta 50th Anniversary 2022 Bookings now open
https://www.betaboyz.myzen.co.uk/forum/index.php?topic=4385.0
 
   Home   Help Contact Admin Search Calendar Gallery Articles Login Register  
Pages: [1]
  Print  
Author Topic: How to check which diff ratio you have….  (Read 452 times)
0 Members and 1 Guest are viewing this topic.
peteracs
Administrator
Legendary Member
******
Offline Offline

United Kingdom United Kingdom

Posts: 3038



« on: March 19, 2022, 09:13:23 AM »

Hi All

I have 3 gearboxes of unknown origin and trying to sort out what diff ratios I have in them.

I have read that it is marked on the body, but so far unable to find any markings at all relating to the ratio.

So I tried to put the box in gear and then interpret the number of revolutions input to output (these are not in a car).

Only one of the output shafts tuns when I do this and so far I have been unable to make sense of the results.

Any suggestions how I may work out what ratios I have would be appreciated!

Peter
Logged

Beta Spyder S2 pre F/L 1600
Beta HPE S2 pre F/L 1600
Nigel
Hero Member
*****
Offline Offline

United Kingdom United Kingdom

Posts: 562



« Reply #1 on: March 19, 2022, 10:58:33 AM »

Hi Peter,

I hope the photo is clear enough. This reads 17/64.
As far as I know, all boxes were stamped just above the left side
output shaft.



* 20220319_diff ratio stamp_resized.jpg (510.16 KB, 980x2016 - viewed 118 times.)
Logged

1984 2.0 Carb HPE [ex Aus] Grigio Finanza.
2007 Mazda 6 2.3 [current daily, highly recommended]
The past:
1980 2.0 HPE White in South Africa [hope it survives!]
1976 1.6 Coupe Lancia Blu [PFG 76R] [probably deceased]
oh,and an Uno Turbo 1997 also in SA [stolen,never recovered]
peteracs
Administrator
Legendary Member
******
Offline Offline

United Kingdom United Kingdom

Posts: 3038



« Reply #2 on: March 21, 2022, 03:18:36 PM »

Hi Nigel

Perfect, after a bit of scraping found it on all 3 boxes, 2 off 1600 and 1 off 2l carb boxes as I suspected.

Hopefully the VX box I am collecting will be correct!

Peter
Logged

Beta Spyder S2 pre F/L 1600
Beta HPE S2 pre F/L 1600
Nigel
Hero Member
*****
Offline Offline

United Kingdom United Kingdom

Posts: 562



« Reply #3 on: March 21, 2022, 10:45:22 PM »

Glad to hear Peter.

As you say, check that VX ratio is correct.
It should read 19/62.

Cheers
Nigel
Logged

1984 2.0 Carb HPE [ex Aus] Grigio Finanza.
2007 Mazda 6 2.3 [current daily, highly recommended]
The past:
1980 2.0 HPE White in South Africa [hope it survives!]
1976 1.6 Coupe Lancia Blu [PFG 76R] [probably deceased]
oh,and an Uno Turbo 1997 also in SA [stolen,never recovered]
mangocrazy
Legendary Member
******
Offline Offline

United Kingdom United Kingdom

Posts: 1177


« Reply #4 on: April 06, 2022, 05:33:15 PM »

I checked both gearboxes I have for stamp marks, and found them easily (on the refurbished box that's fitted to my 2 litre engine) and with the aid of brake cleaner and a rag (on the box originally fitted to the carb 2 litre motor). Both boxes were stamped 14/53 and what I presume to be a serial number was also stamped - 84915 (no leading zeroes) on the refurbed box and 073971 (note leading zero) on the original box. It's tempting to read too much into this, but that adds weight to my suspicion that the refurbished box is a later one as fitted to the i.e. models.

Build date of my Spider has been confirmed as October 1979, and I don't think it was too long after that date that production of the i.e. models started, so I'm hopeful that it's a later box and crossing fingers that it might have the more relaxed 5th gear ratio.

If anyone knows otherwise feel free to disabuse me of these notions...  Grin
Logged

1980 Lancia Beta Spider 2000 (S2FL)
2002 VW Transporter T4
2017 KTM Duke 690R
2008 Aprilia SL1000 Falco
1992 Ducati 888 SP3
1988 Honda VFR750F
1980 Yamaha RD350LC
peteracs
Administrator
Legendary Member
******
Offline Offline

United Kingdom United Kingdom

Posts: 3038



« Reply #5 on: April 06, 2022, 08:13:18 PM »

Hi Graham

I think that the 14/53 is the standard 2l box.

See the following which is posted elsewhere on the forum for list of ratios

Peter



* 021105C7-18A2-4CA6-AE23-EEDAE2758D62.jpeg (103.62 KB, 1024x663 - viewed 46 times.)
Logged

Beta Spyder S2 pre F/L 1600
Beta HPE S2 pre F/L 1600
squiglyzigly
Hero Member
*****
Offline Offline

United Kingdom United Kingdom

Posts: 392



« Reply #6 on: April 07, 2022, 09:23:58 AM »

I’m not sure where I got this from (somewhere on this forum maybe?) but it’s a little more simplistic in its info. No doubt its incomplete but it seems to show a majority of coupe/HPE/Berlina models only seem to have a handful of final drive ratios.
The smallest engines are missing from the list of course.

It seems to show there is one 2.0 carb ratio of 17/64 and two i.e. differential ratios. Early and late? 14/53 and 18/65. Or maybe the 14/53 wasn’t UK market? I’ve not got one and haven’t seen one that I can remember.

I don’t know how accurate this is but of the six 2.0 gearbox’s in my collection, mine are all carb 17/64,  i.e. 18/65 or VX 19/62 according to this chart.


* E6F93067-70F9-47CD-963E-54E572A0566F.jpeg (488.32 KB, 1533x1089 - viewed 46 times.)
Logged

VX HPE (resto started Sept ‘21)
Beta Saloon 2.0l s2 1979 (completed July 2020)
Beta coupé VX (completed April 2017)
peteracs
Administrator
Legendary Member
******
Offline Offline

United Kingdom United Kingdom

Posts: 3038



« Reply #7 on: April 07, 2022, 09:31:00 AM »

Hi

Interesting, so the lower of the IE and carb cars are pretty much the same, odd that the ie is lower than standard carb if only by a whisker, just the higher ratio IE which would be noticeable. Thanks for that, I had not seen the list.

Peter
Logged

Beta Spyder S2 pre F/L 1600
Beta HPE S2 pre F/L 1600
mangocrazy
Legendary Member
******
Offline Offline

United Kingdom United Kingdom

Posts: 1177


« Reply #8 on: April 07, 2022, 02:08:26 PM »

Hmmm - so both my gearboxes are the lowest diff ratios available for the 2000 motors. Bu99er. It's just my luck that the gearbox fitted to the donor i.e. engine that's in the Spider will have the more relaxed 18/65 ratio. I'll check when I go back to France in the next couple of weeks.
Logged

1980 Lancia Beta Spider 2000 (S2FL)
2002 VW Transporter T4
2017 KTM Duke 690R
2008 Aprilia SL1000 Falco
1992 Ducati 888 SP3
1988 Honda VFR750F
1980 Yamaha RD350LC
Pages: [1]
  Print  
 
Jump to:  

Powered by MySQL Powered by PHP Powered by SMF 1.1.21 | SMF © 2015, Simple Machines
SMFAds for Free Forums
Valid XHTML 1.0! Valid CSS!