Handy Gearbox Rebuild Parts c507.5.18 and c510.5.21 SPECIFIC

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Handy Gearbox Rebuild Parts c507.5.18 and c510.5.21 SPECIFIC

Post by youknowturbo on Sat Apr 11, 2015 12:18 pm

Lots of handy info keeps getting lost on facebook about gearbox compatibility and part numbers and handy information, please add to the handy list to build up a helpful thread for everyone

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for mk1 c507 bottom change box the diff bearing from a lancia delta nearside are the same so you will need 2x nearside lancia delta diff bearings to replace your diff bearing part number 7655061
Technical data:

Diameter / inside: approx. 45 mm
Diameter / outdoor 1: approx. 70 mm
Diameter / outside 2: approx. 75 mm
Height: approx. 21 mm



Fiat OE number: 7655061
replaced by new Fiat OE number: 4393442
replaced by new Fiat OE number: 5944142
replaced by new Fiat OE number: 26203999

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PRELOAD c507 bottom change diff bearing (Fiat recommend .08 to .12 and Avanti .15), so anywhere between .08 and .15

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some copied and pasted info from a old forum

Early Uno Turbo had different gearboxes (C507.5.18) bottom change) than lateR models (C510.5.21). top change)

g'box in THE 1.8 and 2.0 Coupe was C.510 as in Tipo but in 2.0 T was C.523 ao not compatible

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Re: Handy Gearbox Rebuild Parts c507.5.18 and c510.5.21 SPECIFIC

Post by youknowturbo on Wed Apr 29, 2015 6:34 am

a bit off topic, but just for future reference Punto GT turbo rear calipers and carryers fit directly onto the uno turbo mounting holes
i have only done this so eradicate a sticky handbrake mechanism and seizing up all the time the disc is uno turbo standard


Last edited by youknowturbo on Thu Nov 12, 2015 11:33 am; edited 1 time in total

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Re: Handy Gearbox Rebuild Parts c507.5.18 and c510.5.21 SPECIFIC

Post by youknowturbo on Thu May 07, 2015 10:20 am

input shaft bearing for bottom change gearbox c507

the input shaft bearing can be replaced without opening the gearbox, on the bell housing side there is a plate at the bottom of the shaft held in by 2x10mm studs and sealant,
you will have to reapply some good quality sealent when re applying the plate being careful not to seal up the oil feed grooves as it is a open bearing and requires constant oil supply
once the plate if off you should be able to get 2 flat head screwdrivers onto the inner race and prie it out being careful not to damage the casing, what i done was put lots of rubber insulation tape on the housing so i could use it to prie the bearing out, upto you how you do yours, this is my method and worked fine

£10 from simply bearings

KOYO NSK 62/22 Open Type Deep Groove Ball Bearing 22x50x14mm

Also Known As: 962221

Inside Diameter: 22mm
Outside Diameter: 50mm
Width: 14mm
Seals / Shields: None
Clearance: * Standard

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Re: Handy Gearbox Rebuild Parts c507.5.18 and c510.5.21 SPECIFIC

Post by youknowturbo on Thu May 07, 2015 10:27 am

also the differential unit from a 510 punto gt turbo 1998 mk1 will fit the mk2 uno turbo 510 box, all the codes are exactly the same

clutch sheild plate from the bottom of the gearbox from a punto gt fits both the bottom c507 and top change 510 uno gearboxes, if you wanted to order a new one, as i now have a undented and non rusty one to go on mine from the punto gt i broke

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Re: Handy Gearbox Rebuild Parts c507.5.18 and c510.5.21 SPECIFIC

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