MTX-75 Gearbox

[Richie350]

Has anyone fitted a Quaife Synco gearkit to there MTX-75 gearbox?

Regards

Richie

[Adrian W]

Richie350 said:

Has anyone fitted a Quaife Synco gearkit to there MTX-75 gearbox?

Regards

Richie

what's one of those?

[Richie350]

Quaife offer 2 upgrade kits for the MTX-75 5 speed gearbox,

Synco GearKit, and a Dog-change Gearkit?

[Richie350]

Sorry that Syncro not synco!!!!

[Mr Noble]

Explain more! My gearchange is the only weak link left now in my beautifully sorted 3R. But the M400 linkage is just too much cash for me to justify. I love to fund another option to make the gearchange like a rifle-bolt action.

G

[gaz 7404]

Just out of interest how much is the M400 linkage? Just cost without any labour?

[mgbond]

gaz 7404 said:

Just out of interest how much is the M400 linkage? Just cost without any labour?

I think it was about 1.5k + vat but there also is alot of work to do.

Bondy

[Richie350]

Quaife offer 2 gear kits for the 5 speed MTX-75 gearbox as fitted to the early cars. A synco kit £1200, and a straight cut dog-change kit £1500, Quaife state these kits will handle 500bhp! I have used Quaife products on other car I have owned, and their products do what they say they do? I wondered if anyone has used this set up????

Richie

[gaz 7404]

ichie you have a eal poblem putting the R in syncro! He He

[Richie350]

The Gearboxman also lists both these kits on his web site?? The MTX-75 gearbox is easy and cheap to get hold of and by removing the gearbox as our friends in the States do easy to fit! I am looking at fitting the Quaife Synco kit along with the Quaife diff to a spare MTX-75 gearbox I have unless someone tells me this has been tried before???

Richie

[Richie350]

Grrrrrrrrrrrrr

[Noblescort]

I wouldn't use the Quaife dog engagement gear-kit on a road car. These gears are straight cut and would make for a very noisy gearbox (comparable to driving in reverse - reverse is normally straight cut whilst all forward gears are helically cut). Also the dog engagement requires some real finesse to get each gear-change right. This mod is really only suited to a race car. The sychro kit however would be a fine mod. This will reduce the internal friction as the gears run on roller bearings. I'd go for this if I were you.

HTH

[Richie350]

Quaife offer various gear ratio setups,any advise here??

Richie

[gaz 7404]

I have a 6 speed box and quaife LSD to put in and was wondering about the linkage, so if i dont buy the rather expensive M400 one, what linkage does it use? is it the MTX 75 linkage?

[Richie350]

I dont know whats involved in fitting the 6 speed box to the early models but £1,500 for the linkage seems daylight robbery!

[Noblescort]

Richie,

In order to get the right ratios you need to do a bit of maths. The correct ratios should be determined by looking at your power and torque curves. Determine the usable rev range of your engine and then calculate the ratios to keep the engine within the desired power band. Additionally you might want to consider what final drive ratio to use at the same time.

[V6GTO]

Aren't the ratios on gto3.com?

[peterguk]

gaz 7404 said:

Just out of interest how much is the M400 linkage? Just cost without any labour?

I'm looking for a full M400 linkage assembly. Cost is a secondary issue to me.

Anyone know who has stock? Can't find one anywhere.

[GTO400]

I'm interested in a linkage kit also if any exist !

[ThatPhilBrettGuy]

Richie350 said:

....Quaife state these kits will handle 500bhp....

Here we go again. All the gearbox / clutch people say 'my product will handle xxxBHP, no problem' and it's a bunch of cock statement! BHP with drivetrain parts is generally totally meaningless. Torque is the measure. Go to them and state you'll be putting 450ft/lbs through their kit, and watch them back peddle.