elwapo Posted October 14, 2017 Share Posted October 14, 2017 Hi all Planning a couple of changes to my 110 , wanted to keep my vehicle strong with a LT230 with 1.667 ratio as I do alot of towing and loaded payload. My question is with my 2.8 TGV engine I was going to fit a 6 speed gearbox from puma , but didn't know what top speed I would have with a 1.667 ratio transfer box. I need a top speed of 60mph but at a nice low rpm. Any help would be great. Quote Link to comment Share on other sites More sharing options...
dailysleaze Posted October 14, 2017 Share Posted October 14, 2017 Go and have a play here: http://www.ashcroft-transmissions.co.uk/calc/ratio_calc.html With standard tyres and diffs, that setup will give you 2850 RPM at 60mph. A 1.4 box will give you 2411 RPM at 60mph and 2071 RPM for a 1.2 ratio. 1.2 is what that gearbox is designed for and 2k revs is well in the power band for a 2.8TGV, albeit at the noisy end 1 Quote Link to comment Share on other sites More sharing options...
Bowie69 Posted October 14, 2017 Share Posted October 14, 2017 Plus... IIRC first gear is very low on the 6 speeds, so towing is no problem. Quote Link to comment Share on other sites More sharing options...
elwapo Posted October 15, 2017 Author Share Posted October 15, 2017 Thanks guys, that calculater is a god send.the mid point between Peak power and peak torque is at 2600 rpm which is at some nice points in mph. With the 1.2. many thanks. Quote Link to comment Share on other sites More sharing options...
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