Revving up super high to get any power?

[71superAS]

Hi,

After replacing the bellhousing and gearbox, I reassembled the car and tried it out. It runs, fires right up, shifts like butter. I can't be happier with the ignition and shifting themselves. However, the car now runs way high in the RPMs compared to the power I am getting. It sounds like I am flooring it to get it started, and then it stays high at any speed, and any gear. Almost like the clutch is slipping, or I am flooring it out of gear. Has anyone ever heard of this?

Thank you!
Patrick

[71superAS]

Hello, anyone?

[68autobug]

Hi Patrick
Sounds like the clutch is slipping...
normally the clutch is either IN or OUT... no slippage..
How fast does the car go in Low gear and Drive 1??
Drive 2 is top gear...
I will look up the speeds in books..
Did You change the main gearbox [differential]
as early cars had the 4.375 to 1 differential ratio
where as later ones had 4.125 to 1 ratio..

Now did You change any ATF hoses??
as these need to be identical to the originals and the fittings too
[exactly the same inside dimensions]
so, its best to use the original fittings and washers on the banjo bolts..
[very important to the flow of ATF]

I would suggest You adjust the clutch servo adjuster [undo locknut and screw the adjuster OUT say one full turn and see if You can still engage reverse gear..
the only other thing could be ATF or oil on the clutch disc?? causing it to slip??

Can You rev the engine IN GEAR with the hand brake on??
Does the car try to go??  or does the clutch slip..

I'm guessing that You may just be imagining the revving of the engine..
as they do go virtually flat out at top speed in top gear..
these were called slow revving engines back in the 50s 60s as car engines revved much harder back then in top gear.. [low geared gearboxes etc]

Maybe cheaper to install a tachometer to see what Your engine revs are..

cheers

LEE in Australia

[71superAS]

No, I am definitely not imagining it. It needs to be floored to get it moving, and the acceleration is horrible from a dead stop.

It was not like this before I replaced these parts.

The gearbox was from a 72, I have a 71, they should be the same as far as I have read.

All hoses and fittings are original.

I will play around with the adjuster some more and see what I can do.

[68autobug]

Hi again
Just remembered, although I don't use a solex carburetor..
the accelerator cable needs to be sticking out of the carby cable holder nearly 20mm
otherwise My car won't accelerate or go flat out as the cable isn't in far enough..
Now this may just be My set up..??

So long as the clutch isn't slipping..
and on the highway the engine is doing 3,500 revs or more +--
which is a lot compared to new cars today..
LOW GEAR is really LOW..
although You would know how Your car went before..
I'll try to find the top speed in one of the manuals of low gear to see how Yours goes..
Only thing I can think of is the differential of Your other gearbox was a late one with 4.125 differential and now You have an early one with 4.375 differential.
|I didn't think the difference would be so great..  If the clutch isn't slipping..
You can usually tell as the top speed can actually get slower... with slippage..
the ATF is still red color.. and doesn't smell burnt..?
maybe one of the washers on the banjo bolts was put on incorrect as there are narrow and thick ones which  when fitted correctly allow the atf to flow correctly...
This could be the problem but its hard to know without pulling them apart..
I did take note of some of these a long time ago...
it seems like the flow of ATF could be restricted... someone had a similar problem with new hose & fittings.. He had to drill out a fitting to make it better..
installing the washers correctly could have been overlooked..
I'm pretty sure Mine had a mixture of thick and thin washers..
I hope I recorded the info somewhere... I remember measuring them..
The ATF system is very balanced...

LEE