Sierra 3L 5 speed box vs Cortina 3L 4 speed

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chevy38
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Sierra 3L 5 speed box vs Cortina 3L 4 speed

Post by chevy38 » Mon 15 Jun 2015, 20:19

Any one know how the Sierra XR6 5 speed gearbox compares to the 4 speed Cortina box

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MAD SAPPHIRE
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Re: Sierra 3L 5 speed box vs Cortina 3L 4 speed

Post by MAD SAPPHIRE » Tue 16 Jun 2015, 09:11

It doesn't. The 4spd is/was an awesome gearbox and ratios was perfect. The Sierra 5spd on the other hand was only just that, a 5spd. Rubbish imo.
My advice do 21R conversion.
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FPT
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Re: Sierra 3L 5 speed box vs Cortina 3L 4 speed

Post by FPT » Tue 16 Jun 2015, 09:18

MAD SAPPHIRE wrote:It doesn't. The 4spd is/was an awesome gearbox and ratios was perfect. The Sierra 5spd on the other hand was only just that, a 5spd. Rubbish imo.
My advice do 21R conversion.

+1 :)
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IndianaJones
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Re: Sierra 3L 5 speed box vs Cortina 3L 4 speed

Post by IndianaJones » Tue 16 Jun 2015, 10:01

MAD SAPPHIRE wrote:It doesn't. The 4spd is/was an awesome gearbox and ratios was perfect. The Sierra 5spd on the other hand was only just that, a 5spd. Rubbish imo.
My advice do 21R conversion.
+2

You can also do a Borg Warner T5 conversion(which was also used in other Fords), but I believe the 21R is still stronger.

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Re: Sierra 3L 5 speed box vs Cortina 3L 4 speed

Post by Jason » Tue 16 Jun 2015, 17:35

Question, here in the States we never got the Essex V6's. We did get the 2.6-2.8-2.9-4.0 Cologne V6. Those were usually backed by SROD 4spd, Toyo Kogyo TK4/TK5 4spd/5spd or a Mazda M5OD-R1 5spd. Was the Sierra 5spd the Ford Europe T9?

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Shaunp
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Re: Sierra 3L 5 speed box vs Cortina 3L 4 speed

Post by Shaunp » Tue 16 Jun 2015, 18:09

I think the South African sierra box was a modded 4 speed. Its not good for big engines but works well for escorts. There is a different bearing and spacer you can use to make the 5 speed stronger for the v6 engine.
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IndianaJones
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Re: Sierra 3L 5 speed box vs Cortina 3L 4 speed

Post by IndianaJones » Tue 16 Jun 2015, 18:17

Jason wrote:Was the Sierra 5spd the Ford Europe T9?
Yes, the 5 speed used in conjunction with the 3L Essex V6 in SA, was the Type 9 transmission, although I think, it was sourced from Brazil.

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lumi-fan
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Re: Sierra 3L 5 speed box vs Cortina 3L 4 speed

Post by lumi-fan » Tue 16 Jun 2015, 20:27

MAD SAPPHIRE wrote:It doesn't. The 4spd is/was an awesome gearbox and ratios was perfect. The Sierra 5spd on the other hand was only just that, a 5spd. Rubbish imo.
My advice do 21R conversion.
Agreed, I was a parts salesman at Ford in the 90s. One of the first part numbers I learned was that of Sierra V6 box. Really crap box.

The Cortina's box is 10 times better.

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chevy38
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Re: Sierra 3L 5 speed box vs Cortina 3L 4 speed

Post by chevy38 » Tue 16 Jun 2015, 20:57

Thanks guys will stick with the 4 speed box,

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Re: Sierra 3L 5 speed box vs Cortina 3L 4 speed

Post by Jason » Wed 17 Jun 2015, 12:28

lumi-fan wrote:
MAD SAPPHIRE wrote:It doesn't. The 4spd is/was an awesome gearbox and ratios was perfect. The Sierra 5spd on the other hand was only just that, a 5spd. Rubbish imo.
My advice do 21R conversion.
Agreed, I was a parts salesman at Ford in the 90s. One of the first part numbers I learned was that of Sierra V6 box. Really crap box.

The Cortina's box is 10 times better.
What box was used in the Cortina? Borg-Warner SR-4? T4?

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