You know what really grinds my gears?

OneJoeZee

OneJoeZee

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Mar 30, 2005
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IJ. said:
Ford trans additive might help out in this case Joe!
Click to expand...

Purchased from Ford dealer?


Kyle: don't feel so bad. The R154 from my clip(in your car) is better than the original R154 that was attached to the 7M in that car. 2nd and 3rd synchros were lazy on that tranny. The JZ one was pretty smoothe when I got it but I did put about 30,000 miles on that car after the swap was done to when I sold it...
 
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IJ.

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Quick explanation how this works!

In the trans you habe brass syncro rings that have tiny grooves inside on a taper that matches the taper on each gear, when you shift the ring grips the gear and speeds/slows it to the next gear (thus "Synchronising it")

In time the brass wears and doesn't grip the gear well enough and you get the clash on shifts, adding a slippery lube like Synthetic just makes it worse.

The Motorcraft additive is sticky gloop :)

Rev matching works by speeding/slowing the gear set so it can engage, anyone that's driven an old truck with a non syncro trans understands this concept and very old cars didn't have it and were dubbed "Crash Boxes".
 
OneJoeZee

OneJoeZee

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Ya, I was aware of the workings of the synchros. I studied my howstuffworks auto section a long time ago. lol

Although, I wasn't aware just exactly what the addictives do to help the mechanics of the tranny internals.

I would say we're really off topic now but since the title does say "what grinds my gears" I think it's ok. :biglaugh:
 
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IJ.

Grumpy Old Man
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Joe: Most people don't have any idea how or why or even care so I thought I'd post just in case someone was interested ;)

In a modern box you don't actually shift gears all you're doing is locking a gear to the mainshaft via a syncro with 4th usually being 1:1 you lock the Input shaft to the Mainshaft.
 
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