[DeTomaso] ZF gear oil per Lloyd Butfoy

[Julian Kift]

I would disgaree with Mr. Drew on the combination of 3.77 and 0.62 5th; With a talll 0.62 5th and 4.22 R&P 75 mph cruising speed is dropped from stock 2,800 rpm to 2,500 rpm. Go with the 3.77 R&P sticking with the stock 0.705 5th it's the smae 2,500 rpm. The combination of 3.77 & 0.62 tall 5th lands at 2,200 rpm for 75 mph. As the ZF 5th is truly an overdrive gear for high speed cruising anyway, I'd be happy at 2,200 rpm for 75 mph, with the bonus of the higher 3.77 gearing through 1st to 4th.
 
Of course if Mr. Drew potters along in the left hand lane with his tall 5th at 65 mph he will be turning 2,200 rpm anyway! I'd shift that 3.77 down to 4th and turn 2,600 rpm at that point, but I can understand some older folks find all the shifitng too much ;)
 
Julian
 
 
To: julian_kift at hotmail.com; detomaso at poca.com
Subject: Re: [DeTomaso] ZF gear oil per Lloyd Butfoy
From: fresnofinches at aol.com
Date: Mon, 9 Feb 2015 19:35:37 -0500




 






If I was forced into buying a Ring & Pinion I think I'd have opted for the 3.77


It was considered. 




The 3.77 AND the .620 is, per Mr. Drew, not viable without a STRONG engine. There is such a thing as too high.



The 3.77 by itself with no 5th change would give the desired MPG improvement, but at the expense of the car's normal performance characteristics.



I, and surely most owners, will only have to rebuild a ZF once during our period of ownership. 



I'm just biting the proverbial bullet and hopefully giving 2511's ZF another 80,000 miles or so of satisfactory performance.



Larry


 		 	   		  
-------------- next part --------------
   I would disgaree with Mr. Drew on the combination of 3.77 and 0.62 5th;
   With a talll 0.62 5th and 4.22 R&P 75 mph cruising speed is dropped
   from stock 2,800 rpm to 2,500 rpm. Go with the 3.77 R&P sticking with
   the stock 0.705 5th it's the smae 2,500 rpm. The combination of 3.77 &
   0.62 tall 5th lands at 2,200 rpm for 75 mph. As the ZF 5th is truly an
   overdrive gear for high speed cruising anyway, I'd be happy at 2,200
   rpm for 75 mph, with the bonus of the higher 3.77 gearing through 1st
   to 4th.

   Of course if Mr. Drew potters along in the left hand lane with his tall
   5th at 65 mph he will be turning 2,200 rpm anyway! I'd shift that 3.77
   down to 4th and turn 2,600 rpm at that point, but I can understand some
   older folks find all the shifitng too much ;)

   Julian


   To: julian_kift at hotmail.com; detomaso at poca.com
   Subject: Re: [DeTomaso] ZF gear oil per Lloyd Butfoy
   From: fresnofinches at aol.com
   Date: Mon, 9 Feb 2015 19:35:37 -0500

     If I was forced into buying a Ring & Pinion I think I'd have opted
     for the 3.77

   It was considered.
   The 3.77 AND the .620 is, per Mr. Drew, not viable without a STRONG
   engine. There is such a thing as too high.
   The 3.77 by itself with no 5th change would give the desired MPG
   improvement, but at the expense of the car's normal performance
   characteristics.
   I, and surely most owners, will only have to rebuild a ZF once during
   our period of ownership.
   I'm just biting the proverbial bullet and hopefully giving 2511's ZF
   another 80,000 miles or so of satisfactory performance.
   Larry