CS1 Lenco

Anybody know what the clutches and steels are from on a CS1 Lenco? I thought I heard it's from an old tranny used in the late 50's Caddy? I know the CS2 has torqueflite stuff but didn't know about the CS1. It's cheaper to buy and you can get them locally too if you know what they are. Thanks, Gary

 

Someone told me a long time ago a cs1 uses ford c6 clutches and steels. I never researched this. It`s easier to call lenco, you always need something else anyway, and you know it will all be correct. Tom.

 

lenco

one of them uses a ford FMX clutch. I have a old CS1 and a late Cs1 and CS2. The old trans has smaller diameter clutches.

 

c6 clutches in ours

We used Ford C6 clutches in our coarse spline CS1. However the inner tabs of the clutch disks must be cut back to fit over the aluminum sleeve in the trans. A local machine shop made up a fixture to hold the clutches for the inner tab cut back. When that fixture was not available, we carefully mounted a set of clutches held from the outside diameter in a 3 or 4 jaw chuck. I do not remember. Then carefully cut the clutch inner tabs. The clutches were supported by only the stiffness of the clutch pack. It was a lot of hassel, and cutting was done slowly, but worked OK. After that, we just used Lenco.

FYI: Different thickness clutch discs were made for the C6. Some with real thick friction material and deep drain slots on the facing. Looked great for a street trans that would go a lot of miles. Although the number of clutches would have to be reduced. Some were a lot thicker. Some were marginally thicker. Also different friction material, some with composite, and some with metallic particles.

We did use a thicker disk on occasion to make up our pack clearance when the conventional disks were worn but still useable.

The thicker clutches could be used in a pack with reduced number of clutches. A few did it to lighten up the clutch pack and reduce friction in low gear. I know of one competitor who would go down to 5 clutch disks in his 1800 HP dragster. This setup would last the race day but not much longer. The thicker clutches would work real well in that case. Not sure about the life of the steels though. The racer made up the clearance with a machined aluminum sleeve. Lenco may have sleeves. The trans drag and rotational mass were really freed up.

Bob Szabo
www.racecarbook.com
bob@racecarbook.com
(916) 419 6649

FYI: free air density, density altitude, and humidity forcasting on www.airdensityonline.com
also on-line jetting calculator www.airdensityonline.com/pro-calcs/
handles up to 4 nozzles per cylinder, blown or normally aspirated;
provides an air to fuel ratio reference and approximate fuel pressure if no gauge reading is available.
Tuning with an air to fuel ratio reference becomes exact.
email me any questions.

 

Thanks guys! Bob, that is what I was thinking of doing. I found the frictions at a local tranny shop and am going to see about making a fixture to cut the I.D. to fit the Lenco. Like you said, there are different grade frictions but the price also increases.