I have an 83 240D chasis with a 617 engine from a 84 300SD, a 4 speed manual tranny from a 83 240D and a 2.88 rear from a 300D turbo. My speedo is approximately 10 mph slower than my actual speed. Do I need a speedo to match the rear (83 300DT), or something else, or a mulitude of things, to make it right?

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Resurrected Nov 2010 - 79 240(SD) with 83 617 engine and 4 speed manual, 2.88 rear and 2.5" straight pipe unknown mileage (Salmon)
83 240D parting out
96 Dodge Cummins 5 sp 4X4 long bed - 310k

http://flickr.com/photos/11103112@N03/

You will need the speedo from an '85 300D. '85 is when they ran the 2.88 rear.

__________________
RRGrassi


70's Southern Pacific #5608 Fairmont A-4 MOW car

13 VW JSW 2.0 TDI 193K, Tuned with DPF and EGR Delete.

99 W210 E300 Turbo Diesel, chipped, DPF/Converter Delete. Still needs EGR Delete, 232K

90 Dodge D250 5.9 Cummins/5 speed. 400K

Gone and still missed...1982 w123 300D, 1991 w124 300D

Well, that's not so bad.

Thanks for that info.

__________________
Resurrected Nov 2010 - 79 240(SD) with 83 617 engine and 4 speed manual, 2.88 rear and 2.5" straight pipe unknown mileage (Salmon)
83 240D parting out
96 Dodge Cummins 5 sp 4X4 long bed - 310k

http://flickr.com/photos/11103112@N03/

Only the speedo/odo needs to be changed when the rear ratio changes.

How is the 2.88 working out? Does it take much slipping to accelerate from a standstill?

It rolls right out. Feels almost like I could start off in 2nd, though I haven't tried it yet. I also don't a have a tach to tell what I'm turning at cruising speed. If I were smarter, or when I get the time, I plan to try and figure it out, or install a tach.
Do you know if it's possible to install an aftermarket tach of some sort. Of course, if I find an 85 cluster I could use the original I guess. I've also heard that a 307 rear is best for MPG.

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Resurrected Nov 2010 - 79 240(SD) with 83 617 engine and 4 speed manual, 2.88 rear and 2.5" straight pipe unknown mileage (Salmon)
83 240D parting out
96 Dodge Cummins 5 sp 4X4 long bed - 310k

http://flickr.com/photos/11103112@N03/

Relabel your speedo 10mph faster

Won't work. It also make the odo show less miles driven.

__________________
RRGrassi


70's Southern Pacific #5608 Fairmont A-4 MOW car

13 VW JSW 2.0 TDI 193K, Tuned with DPF and EGR Delete.

99 W210 E300 Turbo Diesel, chipped, DPF/Converter Delete. Still needs EGR Delete, 232K

90 Dodge D250 5.9 Cummins/5 speed. 400K

Gone and still missed...1982 w123 300D, 1991 w124 300D

win/win situation when its time to sell

So true.


"But officer, MY speedo was reading 70 mph..."

__________________
RRGrassi


70's Southern Pacific #5608 Fairmont A-4 MOW car

13 VW JSW 2.0 TDI 193K, Tuned with DPF and EGR Delete.

99 W210 E300 Turbo Diesel, chipped, DPF/Converter Delete. Still needs EGR Delete, 232K

90 Dodge D250 5.9 Cummins/5 speed. 400K

Gone and still missed...1982 w123 300D, 1991 w124 300D