• Hi Guest! Being a Paying Supporter is NOT a requirement to participate at BCF. However, subscribing will help ensure we can continue to serve the LBC community for years to come. If you enjoy BCF and find our forum a useful resource...Please consider supporting us by **Upgrading**
    (PS: Subscribers don't see this banner)
Tips
Tips

MGA Doc, Do You Know MGAs final gear ratio?

PAUL161

Great Pumpkin
Silver
Country flag
Online
What is the final gear ratio in an MGA rear? Did the ratio change during any of the years? Looking into and picking up information on converting my TF rear for lower RPMs at highway speeds. PJ
 
OP
PAUL161

PAUL161

Great Pumpkin
Silver
Country flag
Online
Come on guys, I know some of you know the answer to this! PJ
 

DrEntropy

Great Pumpkin
Gold
Country flag
Offline
4.3:1 right across the production run. There may have been some variants for racing (4.875, 5.125(!) )but AFAIK the 4.3 chunk was standard.

THIS is that "esoterica" stuff Tony would be able to confirm or dispute. :frown:
 

DrEntropy

Great Pumpkin
Gold
Country flag
Offline
You woke me up, Paul. Where's my <span style="font-weight: bold"><span style="font-style: italic">COFFEE</span></span>?!? :jester:
 
OP
PAUL161

PAUL161

Great Pumpkin
Silver
Country flag
Online
I'm drinking it right now! :devilgrin:
 

DrEntropy

Great Pumpkin
Gold
Country flag
Offline
...selfish git.... :jester:

Not sure about interchangeability from TF to MGA chunks, my WAG is if the axle splines match, it'd work. The input flange is another issue tho.

I think you're looking at an "engineer as you go" project.

Is the TF ratio that much different than the 4.3 MGA?
 

billspohn

Jedi Knight
Country flag
Offline
The MGA 1500 and 1600 used a 4.3 diff as standard, with 4.55 optional. The MGA Mk 2 had a 4.1 as standard.

There were also 4,88 and 5.13 from other BMC models (I've used both in the race cars) and of course the MGB 3.9.
 

David_DuBois

Jedi Warrior
Offline
"I think you're looking at an "engineer as you go" project."

Its all been engineered many years ago by the likes of Carl Cerderstrand and a booklet is available on doing the modification. The booklet is available from Moss Motors, P/N 212-350.

I am finishing the last of that cup of coffee for you Doc.
Cheers,
 

DrEntropy

Great Pumpkin
Gold
Country flag
Offline
Well I guess so, Dave! :wink:

Enjoy it...


I'm not one for switch 'n swap, so you guys have the straight poop on that stuff. Last T-series car I messed with was decades ago.
 
OP
PAUL161

PAUL161

Great Pumpkin
Silver
Country flag
Online
David_DuBois said:
Its all been engineered many years ago by the likes of Carl Cerderstrand and a booklet is available on doing the modification. The booklet is available from Moss Motors, P/N 212-350.

Thanks Dave, I'll send for it. PJ
 

David_DuBois

Jedi Warrior
Offline
DrEntropy said:
I'm not one for switch 'n swap, so you guys have the straight poop on that stuff. Last T-series car I messed with was decades ago.

I agree. That's why our TD still has the 5.125 rear axle in it. We have driven it all over the western US since purchasing it in 1974 and have never any problems with it. 4200 rpm at 60 mph is harder on ones nerves than on the engine.
Cheers,
 
OP
PAUL161

PAUL161

Great Pumpkin
Silver
Country flag
Online
Just put an order into Moss, air cleaners, paint and Carl Cerderstrands book. PJ
 
Similar threads
Thread starter Title Forum Replies Date
AngliaGT How Cool Is This?- For Doc Lotus 4
aeronca65t Doc Weiss-Berwick, PA Racing 0
JPSmit Hey Doc!!! Other British Cars 3
AngliaGT Doc - Here's One for You Other British Cars 3
AngliaGT Hey Doc - Did You See This Cortina? Other British Cars 1
DNK Hey Doc Lotus 1
HEALEYJAG Doc's Jags bankruptcy Jaguar 2
Mickey Richaud Doc? Other British Cars 7
Mickey Richaud Hey, Doc and Mark II Other Cars 5
JPSmit Hey Doc & Mark Other Cars 16
S One for Doc...... Lotus 5
T Doc or Brad Pitt? MG 9
T Doc made me do it.... MG 28
NutmegCT One for Doc Other Cars 30
T To Kerry and Doc....Thank You! A little Progress Other Cars 3
S Doc, ya gotta be EXTRA good this X-mas!! Other Cars 11
Steve One for the Doc and other Alfisti Other Cars 2
weewillie HEY DOC here's a benz for you Other Cars 9
PAUL161 Hap, Doc, Tony, have you heard of this stuff? Restoration & Tools 14
AngliaGT Hey Doc,is this an Alfa? Other Cars 13
DrEntropy Diesela does th' Doc... Other Cars 5
tony barnhill OH, Doc.... MG 31
T 40 HP upgrade, Doc! Triumph 5
Steve A new car for Doc E........ Other British Cars 19
Bret Hey Doc! Need your thoughts on engine oil? Other Cars 4
Steve Hey Doc...... Other Cars 40
Bret Hey Doc! Ever seen this before? Other Cars 9
PAUL161 T-Series OK, Doc,Tony,Jack, etc,etc! Take a Gander at this! MG 25
kennypinkerton For Doc... Alfa Pic. Other Cars 11
PAUL161 Got My HIFs Back from Hap. You were right Doc! MG 4
Steve 911 Question......Doc? Other Cars 25
GB1 Doc- A series history Spridgets 3
kennypinkerton Doc... Alfa parts pics... Other Cars 9
PAUL161 Doc, Spedo. cable MG 1
PAUL161 Doc, Tony, HIF SU434 Carbs Vers. SU493s . MG 4
PAUL161 Thanks Doc & Tony -OD & transmission oil change MG 0
PAUL161 Tony-Doc, OD solenoid gasket change MG 9
PAUL161 Tony, Doc, Question on shock oil type MG 11
tony barnhill Hey, Doc... Other Cars 3
jcatnite Since Jack and Doc are bored Spridgets 14
jlaird Tony, Jollyroger, Doc, Bugeye 58, Jeff Spridgets 15
kennypinkerton My Alfa... And questions for Doc. Other Cars 22
G Wedge Free to good home, TR7 doc Triumph 0
LarryK MGB 20 MGBs, 10 MGAs MG 0
NutmegCT MGA MGAs? MG 6
aeronca65t MGA Sebring MGAs re-unite MG 3
JamesWilson MGA Snopes like MGAs... MG 0
ronzet MGA Speaking of 5 gear Transmissions and MGAs MG 19
Daimlerdb18 MGA Idleness and MGAs MG 5
PAUL161 MGA MGAs have gone up in price?? Hmmmm! MG 9

Similar threads

Top