Tranny & transfer case Question - Pirate4x4.Com : 4x4 and Off-Road Forum

Mavrick331 · 10-13-2009, 05:40 AM

I found some information posted on other threads, but I'm still a little foggy.....

I have a 4L60e out of a 96 corvette, I'm looking at getting a NP241c. The tranny has a long tailcone, when removed the spline is about 7 3/8" long. As long as both are 27 spline, is all I need a 4 bolt tranny side to 6 bolt TC side adapter like this one below on ebay ?

http://cgi.ebay.com/ebaymotors/CHEVR...9#ht_598wt_958

I'm assuming i would just remove the exsisting tail cone on the tranny and bolt this adapter up, if this is correct the spline on the tranny would stick out 3 7/8" past the adapter, does this all fit in the transfer case input spline?

Been out of 4wd's a long time....

Thanks,
Rick

ryan22re · 10-13-2009, 06:15 AM

It's the same 27 spline, but IIRC, the 2wd shafts are like 3 inches longer than the 4wd shafts.

Mavrick331 · 10-13-2009, 06:55 AM

So is there an adapter for a 2WD 4L60e to a np241c case?

Rick

ryan22re · 10-13-2009, 07:06 AM

All I can tell you is that you need to swap the output shaft from the 2wd to the 4wd version and then run the adapter you posted above.

There may be a spacer available that would go between the 2wd case and the trans-tcase adapter, but I don't want to search for it.

Mavrick331 · 10-13-2009, 08:16 AM

Thanks,

I couldn't find any spacer, It appears the only way is to do as you say, change the shaft. I can barely spell transmission much less tear one apart.

I might be easier to sell this one and pick up one with the shorter cone. Somewhere I read it's better to keep the tranny that was mated to the engine. I picked up this one that came out of a 96 corvette, under 80k on the odometer for a killer deal.

Rick -

lt1yj · 10-13-2009, 09:19 AM

It's not that expensive to have a tranny shop pull it apart and replace the output shaft. I had mine converted for $100 and that included the new shaft. I also upgraded the reaction hub shell while I was at it. He did that for the price of the shell since he already had it apart.

Mavrick331 · 10-13-2009, 12:40 PM

Thanks,

I hit transmission shop at lunch, 120 for all.

Rick

10-13-2009, 05:40 AM	#1 (permalink)
Mavrick331 Registered User Join Date: Oct 2009 Member # 144155 Posts: 4	Tranny & transfer case Question I found some information posted on other threads, but I'm still a little foggy..... I have a 4L60e out of a 96 corvette, I'm looking at getting a NP241c. The tranny has a long tailcone, when removed the spline is about 7 3/8" long. As long as both are 27 spline, is all I need a 4 bolt tranny side to 6 bolt TC side adapter like this one below on ebay ? http://cgi.ebay.com/ebaymotors/CHEVR...9#ht_598wt_958 I'm assuming i would just remove the exsisting tail cone on the tranny and bolt this adapter up, if this is correct the spline on the tranny would stick out 3 7/8" past the adapter, does this all fit in the transfer case input spline? Been out of 4wd's a long time.... Thanks, Rick

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10-13-2009, 06:15 AM	#2 (permalink)
ryan22re Registered User Join Date: Nov 2005 Member # 62268 Location: Irmo, SC Posts: 80	It's the same 27 spline, but IIRC, the 2wd shafts are like 3 inches longer than the 4wd shafts.

10-13-2009, 06:55 AM	#3 (permalink)
Mavrick331 Registered User Join Date: Oct 2009 Member # 144155 Posts: 4	So is there an adapter for a 2WD 4L60e to a np241c case? Rick

10-13-2009, 07:06 AM	#4 (permalink)
ryan22re Registered User Join Date: Nov 2005 Member # 62268 Location: Irmo, SC Posts: 80	All I can tell you is that you need to swap the output shaft from the 2wd to the 4wd version and then run the adapter you posted above. There may be a spacer available that would go between the 2wd case and the trans-tcase adapter, but I don't want to search for it.

10-13-2009, 08:16 AM	#5 (permalink)
Mavrick331 Registered User Join Date: Oct 2009 Member # 144155 Posts: 4	Thanks, I couldn't find any spacer, It appears the only way is to do as you say, change the shaft. I can barely spell transmission much less tear one apart. I might be easier to sell this one and pick up one with the shorter cone. Somewhere I read it's better to keep the tranny that was mated to the engine. I picked up this one that came out of a 96 corvette, under 80k on the odometer for a killer deal. Rick -

10-13-2009, 09:19 AM	#6 (permalink)
lt1yj Registered User Join Date: Jan 2002 Member # 9467 Location: Michigan Posts: 1,620	It's not that expensive to have a tranny shop pull it apart and replace the output shaft. I had mine converted for $100 and that included the new shaft. I also upgraded the reaction hub shell while I was at it. He did that for the price of the shell since he already had it apart.

10-13-2009, 12:40 PM	#7 (permalink)
Mavrick331 Registered User Join Date: Oct 2009 Member # 144155 Posts: 4	Thanks, I hit transmission shop at lunch, 120 for all. Rick