Z32 gearbox on a S13 with ca18det - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

shogun! · 02-08-2007, 02:43 PM

Before you disassemble the clutch housing of the S13 gearbox, you have to make a centering device. Use a plexi glass plate (10mm) and drill a 16mm hole in the centre, put the plate over the shaft (snug fit) and carefully drill 4 small holes exactly in the centre of the holes where the gearbox is attached to the motor. Remove the plate and carefully drill the holes just as big to get the screws in

Result

Remove the clutch housing from the ca18det S13 gearbox. It is more or less just to remove the screws on the outside of the clutch housing, remove the cover and one snap ring.

Remove the snap ring under the cover

Comparision between the both gearboxes. One is useless over 350-400Bhp, the other last well over 1000Bhp and more.

Use an angle cutting machine and cut off the flange from the S13 gearbox ca. 50mm, take it to a machine shop and have it grinded down to 45mm. Important to get it absolutely flat and equal all around.

Use an angle cutting machine and cut off the flange from the Z32 gearbox ca. 40mm, throw away the flange and take the rest of the clutch housing to a machine shop and have it grinded down to 355mm. Important to get it absolutely flat and equal all around.

Both parts after grinding, cleaning and reattaching the clutch housing on the Z32 gearbox

shogun! · 02-08-2007, 02:44 PM

Put the S13 flange snug to the Z32 clutch housing and attach the centering plate with four screws

Side view

Top view. Important to align and rotate them like on the picture

If you do not own a TIG-welding machine, you go to the machine shop again and have it carefully welded together, both from the outside and the inside

((((space for picture...after welding))))

shogun! · 02-08-2007, 02:44 PM

Reuse the shift stick bracket from the Z32 gearbox. You have to cut out some small triangles from it, bend it to a Z-shape to fit the S13 under body and then weld the cut outs together. (borrowed picture)

The new short shift

A small change of shift stick position compared to the original (borrowed picture)

A plate to cover the hole at the shift stick (borrowed picture)

A bracket to hold the gearbox in place (borrowed picture)

Aligning the gearbox with the rear axle. Put a steel tube in the gearbox, aim it towards the centre of the rear axle flange and find the final position of the gearbox bracket. (borrowed picture)

Side view (borrowed picture)

Front view (borrowed picture)

The prop shaft. Mount the Z32 yoke in the gearbox and the original flange on the rear axle. Measure the centre distance between the loops in the yoke and in the rear flange. Use this measure and go to your local prop shaft supplier and have him to make your new prop shaft. The shaft rotate at about 10.000rpm at max speed so it has to be dimensioned for the forced and also balanced.
(I will edit this post and put in a better photo and necessary dimensions)

shogun! · 02-08-2007, 02:45 PM

Some more parts belonging to the drive train:

Replaced the internal parts with a really good Deftforce LSD from ATS in Japan

The part number if you plan to buy one yourself. It is an easy exchange; out, move over the tooth ring, clean, mount new sealings, in, oil...ready

OS Giken Twin Disc clutch

Disassembled clutch (discs, pressure plate and flywheel in one lightweight unit)

Before switching over to five stud hub

The new hub set (is on the car now)

New rims on in the garage. Note the nice height of the fender...the 600hp engine is out meeting some new nice parts

luisgonz · 02-08-2007, 02:49 PM

Please dont post if you have nothing good to say about this.

02-08-2007, 02:43 PM	#1
shogun! Zilvia Junkie Join Date: Mar 2005 Location: Sweden Posts: 367 Trader Rating: (0) Feedback Score: 0 reviews	Before you disassemble the clutch housing of the S13 gearbox, you have to make a centering device. Use a plexi glass plate (10mm) and drill a 16mm hole in the centre, put the plate over the shaft (snug fit) and carefully drill 4 small holes exactly in the centre of the holes where the gearbox is attached to the motor. Remove the plate and carefully drill the holes just as big to get the screws in Result Remove the clutch housing from the ca18det S13 gearbox. It is more or less just to remove the screws on the outside of the clutch housing, remove the cover and one snap ring. Remove the snap ring under the cover Comparision between the both gearboxes. One is useless over 350-400Bhp, the other last well over 1000Bhp and more. Use an angle cutting machine and cut off the flange from the S13 gearbox ca. 50mm, take it to a machine shop and have it grinded down to 45mm. Important to get it absolutely flat and equal all around. Use an angle cutting machine and cut off the flange from the Z32 gearbox ca. 40mm, throw away the flange and take the rest of the clutch housing to a machine shop and have it grinded down to 355mm. Important to get it absolutely flat and equal all around. Both parts after grinding, cleaning and reattaching the clutch housing on the Z32 gearbox __________________ My +700hp RS13

02-08-2007, 02:44 PM	#2
shogun! Zilvia Junkie Join Date: Mar 2005 Location: Sweden Posts: 367 Trader Rating: (0) Feedback Score: 0 reviews	Put the S13 flange snug to the Z32 clutch housing and attach the centering plate with four screws Side view Top view. Important to align and rotate them like on the picture If you do not own a TIG-welding machine, you go to the machine shop again and have it carefully welded together, both from the outside and the inside ((((space for picture...after welding)))) __________________ My +700hp RS13

02-08-2007, 02:44 PM	#3
shogun! Zilvia Junkie Join Date: Mar 2005 Location: Sweden Posts: 367 Trader Rating: (0) Feedback Score: 0 reviews	Reuse the shift stick bracket from the Z32 gearbox. You have to cut out some small triangles from it, bend it to a Z-shape to fit the S13 under body and then weld the cut outs together. (borrowed picture) The new short shift A small change of shift stick position compared to the original (borrowed picture) A plate to cover the hole at the shift stick (borrowed picture) A bracket to hold the gearbox in place (borrowed picture) Aligning the gearbox with the rear axle. Put a steel tube in the gearbox, aim it towards the centre of the rear axle flange and find the final position of the gearbox bracket. (borrowed picture) Side view (borrowed picture) Front view (borrowed picture) The prop shaft. Mount the Z32 yoke in the gearbox and the original flange on the rear axle. Measure the centre distance between the loops in the yoke and in the rear flange. Use this measure and go to your local prop shaft supplier and have him to make your new prop shaft. The shaft rotate at about 10.000rpm at max speed so it has to be dimensioned for the forced and also balanced. (I will edit this post and put in a better photo and necessary dimensions) __________________ My +700hp RS13

02-08-2007, 02:45 PM	#4
shogun! Zilvia Junkie Join Date: Mar 2005 Location: Sweden Posts: 367 Trader Rating: (0) Feedback Score: 0 reviews	Some more parts belonging to the drive train: Replaced the internal parts with a really good Deftforce LSD from ATS in Japan The part number if you plan to buy one yourself. It is an easy exchange; out, move over the tooth ring, clean, mount new sealings, in, oil...ready OS Giken Twin Disc clutch Disassembled clutch (discs, pressure plate and flywheel in one lightweight unit) Before switching over to five stud hub The new hub set (is on the car now) New rims on in the garage. Note the nice height of the fender...the 600hp engine is out meeting some new nice parts __________________ My +700hp RS13

02-08-2007, 02:49 PM	#5
luisgonz BANNED Join Date: May 2004 Location: los angeles Age: 42 Posts: 2,761 Trader Rating: (6) Feedback Score: 6 reviews	Please dont post if you have nothing good to say about this.