Here's the story, I bought a 90' CRX Si for $1100 planning on swapping in a ZC engine. At the same time I became aware of someone at my work who had a 90' CRX HF sitting in their driveway for the last year that needed some trans work. I went ahead and bought the CRX Si and am loving it. My friend is buying the HF for $500 with plans of taking my engine when I swap. If he bought an Si Trans right now would it work fine with the HF's motor? I know it will work for us further down the road when we swap in the Si. Also are there any weird things we need to know about when swapping a HF to an SI, it's not documented that much compared to all the stuff on the ZC swap. Thanks

 

the trannys will swap, but expect the HF motor to be the same lackluster POS.

 

the hf trans is has long gearing swapping a si trans has shorter gearing. I would not reccomend doing this try to trade someone for a hf trans. When i had my crx with a hf trans going 70 on 5th gear it was at 4500 rpm and the redline is 5500.
It a great for city driving i was doing a lot of it with the trans and got about 35-40mpg on city but horriable freeway about 25-30. Better off to get a dx, hf trans.

P.S it accelrated through the gaers fast but it didnt go anywhere