Hi chaps, as per the title, i can provide you with a plug and play Mk1 6 speed gearbox conversion for your 4a-ge.
Is your 5 speed notchy?
Jumping out of fifth?
whining diff?
Lots of play on the driveshafts?
Crunching into gear?
Leaking oil?
Thinking about spending a lot of money on a recon gearbox?
Maybe now is the time to go 6 speed and bring your Mk1 up to date with a fresh gearbox at the same time.
What you get
I use a Celica Gen7 6 speed as the base donor gearbox, strip it right down, and refit the internals/gears into a Mk1b bellhousing (gives you two starter motor locations for use with either 16v or 20v swaps)
All gear cases are high pressure steam cleaned, new diff side bearings fitted to either your choice of stock C52 open diff or Mk3 Mr2 LSD unit.
The diff preload is then checked and adjusted methodically and reshimmed to the top end of Toyota spec.
The gears are all inspected, and new Toyota input shaft and output shaft bearings are installed.
The input shaft oil seal and both diff output oil seals are renewed.
The whole transmission is sealed and painted.
So you end up with a bearing and seal overhauled 6 speed gearbox that will bolt straight onto your 4a-ge engine without any modification whatsoever, your speedo cable will plug straight in, reverse light will plug in, driveshafts will work as normal with the Mk1 stock diff, all mountings will be OEM and the shifter assembly and slave cylinder will all just bolt up without any modification, truely plug and play. It will be a simple transmission swap no different than fitting another 5 speed.
If you request the LSD option then you will need to fit Mk2 NA driveshafts, but these are again plug and play into both the diff and Mk1 hubs without any mods.
The 6 speed will be carefully packed and shipped to your door within 2 weeks of ordering.
The gear ratios will be as follows...
1st gear 3.166
2nd gear 2.050
3rd gear 1.481
4th gear 1.166
5th gear 0.916
6th gear 0.725
Final drive 4.529
Costs
There is a lot of labour involved with this product, and a lot of parts costs, but i feel i am offering something special with this.
The new Toyota bearings and seals costs come to £350
The Celica 6 speed donor cost £250
Mk1b donor gearbox cost £100
Postage/Packaging £30
My labour costs to build this gearbox £300
This comes to £1030 , now there is often some discount to be had buying donor transmissions in bulk, i have four 6 speeds on their way this week alone, so i am advertising this at a delivered to your door price of £950 all in.
There is a company in the US that builds these for $4,500 each :shock:
If you want the LSD version you will need to add £250 to the above.
This is as cheap as a 6 speed Mk1 gearbox is ever going to get.
If you wish to send me your Mk1B gearbox as the donor i can knock £100 off the cost, please remember i cannot accept a Mk1A gearbox, its casing is not suitable for use. You can send me any Mk1B gearbox and it doesn't matter about its internal gears condition, we only use the bellhousing section.
If anyone has any questions i'm more than happy to answer, thankyou Paul.
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Originally Posted by pilotpete
