• The Roadster Factory Recovery Fund - Friends, as you may have heard, The Roadster Factory, a respected British Car Parts business in PA, suffered a total loss in a fire on Christmas Day. Read about it, discuss or ask questions >> HERE. The Triumph Register of America is sponsoring a fund raiser to help TRF get back on their feet. If you can help, vist >> their GoFundMe page.
  • Hey there Guest!
    If you enjoy BCF and find our forum a useful resource, if you appreciate not having ads pop up all over the place and you want to ensure we can stay online - Please consider supporting with an "optional" low-cost annual subscription.
    **Upgrade Now**
    (PS: Subscribers don't see this UGLY banner)
Tips
Tips

TR4/4A A type Overdrive Oil Leak Fix

mastaphixa

Jedi Trainee
Bronze
Country flag
Online
I have been bench testing my A type over drive and have discovered a leak between the housing the solenoid mounts to and the case of the overdrive. Removing it looks fairly straight forward but I need to know if I remove the nuts and bolts that hold that housing in place are there any springs/ball bearings that are going to try and fly out of there? I hope to place the transmission nose down on the bench allowing the oil to drain from the overdrive, remove the operating arm from the shaft, remove the solenoid from the housing, remove the bolts/nuts that retain the housing, separate the housing from the OD, clean and reseal the gasket and reinstall. Does this sound right? I don't have the Laycock manual so any advice offered would be appreciated.
Steve Baker
 

TR3driver

Great Pumpkin - R.I.P
Offline
Nothing should "fly out", but there are some very strong springs behind that plate. Remove the two nuts first, then back the bolts out a little at a time to release the pressure.

Don't forget that by removing the arm, you will be disturbing a fairly finicky adjustment. In some cases, the "adjustment lever" on the other side may not be accurate, leading to further complications. I always check the "ball lift", as outlined near the end of the article at https://www.buckeyetriumphs.org/s/A-Type-Overdrive-Part-IV-cha7.pdf
(However, I view .016" as being on the small side and prefer .030".)

Here's the factory manual. Obviously written much earlier, but I don't know of any later version.
https://drive.google.com/open?id=0B2H2NJt34OffODZjM2FkY2ItZTBlZS00N2Q3LWJmZTUtMTRkN2MxNDI4M2Vj
 
OP
M

mastaphixa

Jedi Trainee
Bronze
Country flag
Online
Randall,
Thanks for the advise and the link to the manual!!! I have read the Buckeye article and will have a look a the ball lift going back together. This one is freshly overhauled and I did use the 3/16 rig pin hole on the right side. It does go in and out of OD quite nicely using a drill to turn the tail shaft. I haven't checked pressures.
 

Graham H

Jedi Warrior
Country flag
Offline
If you place the box bell housing down on the bench the oil will run out the breather hole at the front of the shifter cover, better off with it on its side solenoid up.

Graham
 
Similar threads
Thread starter Title Forum Replies Date
71TR6 TR6 Type-J Overdrive identification Triumph 4
T TR2/3/3A A type overdrive hard engagement Triumph 28
R TR6 J-Type overdrive will not disengage when warm Triumph 8
RonC TR2/3/3A J Type Overdrive in TR3A Triumph 4
H TR4/4A A-type overdrive pump Triumph 4
Got_All_4 TR6 Refurbishing gearbox with A type overdrive Triumph 7
D TR2/3/3A Type A overdrive not engaging Triumph 0
D TR2/3/3A Type A overdrive not engaging Triumph 16
Graham H TR2/3/3A A type overdrive Triumph 6
KVH General TR Type A Laycock Overdrive Questions Triumph 8
C TR2/3/3A A-type overdrive drain plug oring Triumph 1
J TR4/4A TR4 A Type Overdrive Part mixup Triumph 4
CJD TR2/3/3A A type Overdrive Seal Triumph 9
T Spitfire J Type overdrive Triumph 2
T TR2/3/3A Question on A-type overdrive solenoid Triumph 21
BillyB62 TR2/3/3A Type A TR3 Overdrive Wiring Triumph 13
T TR2/3/3A Question on A type overdrive spec for "clutch movement from direct to overdrive" Triumph 7
M_Pied_Lourd TR6 J Type Overdrive High Pressure Filter Cap-Major Problem Triumph 6
R A Type Overdrive reassembly question Austin Healey 3
R TR2/3/3A A-Type overdrive question Triumph 8
T TR2/3/3A My A-Type overdrive rebuild project, some questions Triumph 36
T TR2/3/3A Will Spitfire D-type overdrive work in TR3 with TR4 transmission? Triumph 3
R Overdrive [Type A] brake ring gaskets Austin Healey 1
R TR2/3/3A Overdrive [Type A] Brake Ring Gaskets Triumph 14
J General TR D Type overdrive not working need suggestions Triumph 5
Gordon_Dedrick TR2/3/3A A type overdrive installation Triumph 7
T TR2/3/3A Type A Overdrive, Physical Differences between Roadster Brands? Triumph 2
T TR2/3/3A Type-A Overdrive Handling Differences Triumph 9
A TR5/TR250 A-type overdrive questions Triumph 25
71tr TR6 Overdrive Mount / J-type on A-type frame Triumph 1
D TR6 76 TR6 J Type Overdrive Triumph 7
Gordon_Dedrick Testing an A type overdrive Triumph 20
Simmo I need help with J Type Overdrive Triumph 15
Q "A" Type Overdrive Annulus End Float!! Triumph 4
D A type overdrive question. Triumph 3
John_Mc J-Type overdrive for sale on CL Triumph 4
KVH More on A Type The Overdrive Triumph 2
Coyote1 J Type Overdrive engage problem Triumph 3
J A Type Overdrive Triumph 17
K TR6 TR6 J Type Overdrive...Link to Schematic? Triumph 3
O J Type Overdrive Conversion Triumph 19
Marvin Gruber J type overdrive unit on BCF classifieds Triumph 2
HerronScott TR4/4A TR4A A-type overdrive and Moss Europe TR2-4A cat. Triumph 2
T A-type Overdrive & Gearbox Triumph 9
TR3TR6 J-type overdrive question Triumph 5
CinneaghTR A-type Overdrive Model Number Triumph 14
71tr J-type Overdrive Pressure Port Question Triumph 2
T A-type overdrive / gearbox trouble shooting Triumph 69
R_Lyle TR6 J-Type or A-Type Overdrive for 1972 TR6 Triumph 18
TR4A_IRS Looking for a J Type Overdrive? Triumph 0

Similar threads

Top